Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons...

Look up fission in Wiktionary, the free dictionary. Fission, a splitting of something into two or more parts, may refer to: Fission (biology), the division...

Boosted fission weapons are fission weapons that use nuclear fusion reactions to generate high-energy neutrons that accelerate the fission chain reaction...

force from nuclear reactions, either nuclear fission (fission or atomic bomb) or a combination of fission and nuclear fusion reactions (thermonuclear weapon)...

multi-stage design is distinct from the usage of fusion in simpler boosted fission weapons. The first full-scale thermonuclear test (Ivy Mike) was carried...

A nuclear reactor is a device used to sustain a controlled fission nuclear chain reaction. They are used for commercial electricity, marine propulsion...

nuclear fission, nuclear decay and nuclear fusion reactions. Presently, the vast majority of electricity from nuclear power is produced by nuclear fission of...

Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts to separate entities resembling the...

A natural nuclear fission reactor is a uranium deposit where self-sustaining nuclear chain reactions occur. The idea of a nuclear reactor existing in...

Mitochondrial fission is the process by which mitochondria divide or segregate into two separate mitochondrial organelles. Mitochondrial fission is counteracted...

Spontaneous fission (SF) is a form of radioactive decay in which a heavy atomic nucleus splits into two or more lighter nuclei. In contrast to induced fission, there...

fission weapon is a type of nuclear weapon that makes use of a small amount of fusion fuel to increase the rate, and thus yield, of a nuclear fission...

fertile material in turn transmutes into fissile material which can undergo fission reactions. Breeders were at first found attractive because they made more...

spontaneous fission or even induced fission with fast neutrons; uranium-235, and to a lesser degree uranium-233, have a much higher fission cross-section...

Ternary fission is a comparatively rare (0.2 to 0.4% of events) type of nuclear fission in which three charged products are produced rather than two....

A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked...

Most neutron absorptions induce fission, though a minority (about 15%) result in the formation of uranium-236. The fission of one atom of uranium-235 releases...

Nuclear fission was discovered in December 1938 by chemists Otto Hahn and Fritz Strassmann and physicists Lise Meitner and Otto Robert Frisch. Fission is a...

neutrons by short half-life fission products is known as reactor poisoning; neutron capture by long-lived or stable fission products is called reactor...

In ethology, a fission–fusion society is a social organization in which the size and composition of the group change as time passes and animals move throughout...

fission at thousands of times the rate of plutonium-239, and the extra neutrons thereby released made it likely that plutonium in a gun-type fission weapon...

discusses each of the main elements in the mixture of fission products produced by nuclear fission of the common nuclear fuels uranium and plutonium. The...

space probes and on the crewed Apollo missions to the Moon. Small nuclear fission reactors for Earth satellites have also been flown, by the Soviet US-A...

discovered by James Chadwick in 1932, leading to the discovery of nuclear fission in 1938, the first self-sustaining nuclear reactor (Chicago Pile-1, 1942)...

Nuclear fission products are the atomic fragments left after a large atomic nucleus undergoes nuclear fission. Typically, a large nucleus like that of...

The fission-fragment rocket is a rocket engine design that directly harnesses hot nuclear fission products for thrust, as opposed to using a separate...

tertiary fissioning of the bomb's 238U fusion tamper and casing. Consequently, this type of bomb is also known as a "fission-fusion-fission" device. The...

feedback loop" of these reactions. The specific nuclear reaction may be the fission of heavy isotopes (e.g., uranium-235, 235U). A nuclear chain reaction releases...

isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear...

In nuclear physics, fission product yield refers to the fraction of a fission product produced per fission. Nuclear fission splits a heavy nucleus such...

giving the capability to build fission bombs and thermonuclear weapons with yields up to 200 kilotons. While the Indian fission bombs have been documented...

uranium-235, led to its use in nuclear weapons and nuclear power plants. A fission of an atom of uranium-235 (with 0.720% abundance) in a nuclear reactor...

nuclear fusion–fission (hybrid nuclear power) is a proposed means of generating power by use of a combination of nuclear fusion and fission processes. The...

Singlet fission is a spin-allowed process in molecular photophysics that converts one singlet excited state into two triplet states. It occurs in molecular...

the burst of neutrons would cause nearby warheads to undergo partial fission, preventing them from exploding properly. For this to work, the ABM would...

the radiation implosion principle, using thermal X-rays released from a fission nuclear primary to compress and ignite nuclear fusion in a secondary. This...

Similar to how the fission-fragment rocket produces thrust, a fission fragment reactor is a nuclear reactor that generates electricity by decelerating...

nuclear fission event, as opposed to a delayed neutron decay which can occur within the same context, emitted after beta decay of one of the fission products...

Gun-type fission weapons are fission-based nuclear weapons whose design assembles their fissile material into a supercritical mass by the use of the "gun"...

as a synthetic element. Naturally occurring technetium is a spontaneous fission product in uranium ore and thorium ore (the most common source), or the...

Fission Uranium Corp. is a mineral exploration company engaged in the exploration and development of uranium assets. Its sole project is the Patterson...

strongly suggest that the closed shell will confer further stability towards fission and alpha decay. While these effects are expected to be greatest near atomic...

produced by fission from an artificially produced nuclear chain reaction. For instance, when a uranium atom is bombarded with slow neutrons, fission takes place...

nuclear fission or nuclear fusion or a multi-stage cascading combination of the two, though to date all fusion-based weapons have used a fission device...

Schizosaccharomyces pombe, also called "fission yeast", is a species of yeast used in traditional brewing and as a model organism in molecular and cell...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

plutonium-239 captures a neutron without undergoing fission. The detection of its spontaneous fission led to its discovery in 1944 at Los Alamos and had...

weapons and nuclear reactors. Plutonium-240 has a high rate of spontaneous fission, raising the neutron flux of any sample containing it. The presence of...

accelerators. Fast neutrons are produced by nuclear processes: Nuclear fission: thermal fission of 235 U produces neutrons with a mean energy of 2 MeV (200 TJ/kg...

(SR-1) is a proposed NASA spacecraft intended to be the first nuclear fission-powered interplanetary mission and to demonstrate nuclear electric propulsion...

designed was capable of 4 megatonnes per tonne yield). The largest pure-fission bomb ever constructed, Ivy King, had a 500 kilotonne yield, which is probably...

fission fuel in a blanket of nuclear waste, a concept known as a fission-fusion hybrid. In these systems, the power output is enhanced by the fission...

A subcritical reactor is a nuclear fission reactor concept that produces fission without achieving criticality. Instead of sustaining a chain reaction...

Long-lived fission products (LLFPs) are radioactive materials with a long half-life (more than 200,000 years) produced by nuclear fission of uranium and...

or simply a fast reactor is a category of nuclear reactor in which the fission chain reaction is sustained by fast neutrons (carrying energies above 1...

Whereas all early applications for nuclear thermal rocket propulsion used fission processes, research in the 2010s has moved to fusion approaches. The Direct...

delayed neutron is a neutron released not immediately during a nuclear fission event, but shortly afterward—ranging from milliseconds to several minutes...

when compared to conventional weapons. In multistage fission-fusion weapons, full yield of the fission primary that fails to initiate fusion ignition in...

{\displaystyle \nu _{t}} are the average number of neutrons produced per fission in the medium (2.43 for uranium-235). σ f F {\displaystyle \sigma _{f}^{F}}...

nuclear engineering, fissile material is material that can undergo nuclear fission when struck by a neutron of low energy. A self-sustaining thermal chain...

thermonuclear weapons, commonly called hydrogen bombs, which use a pure fission or boosted fission primary stage to ignite nuclear fusion in a secondary stage, using...

bomb, possesses enormous destructive power from nuclear fission, or a combination of fission and fusion reactions. In the first decades of the 19th century...

and nuclear chemistry, the fission barrier is the activation energy required for a nucleus of an atom to undergo fission. This barrier may also be defined...

reactions. The fission or "nuclear" chain-reaction, using fission-produced neutrons, is the source of energy for nuclear power plants and fission-type nuclear...

exothermic nuclear transmutations are nuclear fission and nuclear fusion. Nuclear energy may be released by fission, when heavy atomic nuclei (like uranium...

Mitochondrial fission factor (Mff) is a protein that in humans is encoded by the MFF gene. Its primary role is in controlling the division of mitochondria...

and archaea) usually undergo a vegetative cell division known as binary fission, where their genetic material is segregated equally into two daughter cells...

xenon-135 is produced by beta decay from iodine-135 (a product of nuclear fission), and is the most significant (and unwanted) neutron absorber in nuclear...

The fission sail is a type of spacecraft propulsion proposed by Robert Forward that uses fission fragments to propel a large solar sail-like craft. It...

Fission Chicken is a comic book and webcomic character created by John Patrick (J.P.) Morgan (1957–2010). Fission Chicken is a short-tempered superhero...

half-lives less than 2 weeks, most under an hour. Caesium is an abundant fission product (135 and 137 are directly produced) and various isotopes are of...

A criticality accident is an accidental uncontrolled nuclear fission chain reaction. It is sometimes referred to as a critical excursion, critical power...

ionization by fission fragments and other ionizing radiation produced by the fissioning process." The spacecraft variant of the gaseous fission reactor is...

world, the reaction focused on the incorrectly assumed record level of fission product fallout from a typical fissionable tamper design, similar to the...

Fast fission is fission that occurs when a heavy atom absorbs a high-energy neutron, called a fast neutron, and splits. Most fissionable materials need...

if each fission event causes, on average, exactly one additional such event in a continual chain. Such a chain is a self-sustaining fission chain reaction...

referred to as the father of nuclear chemistry and discoverer of nuclear fission, the science behind nuclear reactors and nuclear weapons. Hahn and Lise...

especially deuterium, tritium, and helium-3. The opposite process, nuclear fission, is most energetic for very heavy nuclei, especially the actinides. Applications...

rocket (NTR), thrust is created by heating a fluid by using a nuclear fission reactor. The lower the molecular weight of the exhaust (hydrogen having...

Uranium-233 usually fissions on neutron absorption but sometimes retains the neutron, becoming uranium-234. The capture-to-fission ratio is smaller than...

nuclear fission, as was subsequently recognized and published by Lise Meitner and Robert Frisch. In their second publication on nuclear fission in February...

Cold fission or cold nuclear fission is defined as involving fission events for which fission fragments have such low excitation energy that no neutrons...

breached, and the nuclear fuel (such as uranium, plutonium, or thorium) and fission products (such as caesium-137, krypton-85, or iodine-131) within the fuel...

uranium-based and mixed-oxide (MOX) fuels. The residual 4% is minor actinides and fission products, the latter of which are a mixture of stable and quickly decaying...

fission in a nuclear reactor for the production of energy. Most nuclear reactors use a chain reaction to induce a controlled rate of nuclear fission in...

Safe affordable fission engine (SAFE) were NASA's small experimental nuclear fission reactors for electricity production in space. Most known was the SAFE-400...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

material depends upon its nuclear properties (specifically, its nuclear fission cross-section), density, shape, enrichment, purity, temperature, and surroundings...

Nuclear reprocessing is the chemical separation of fission products and actinides from spent nuclear fuel. Originally, reprocessing was used solely to...

{\displaystyle \nu _{t}} are the average number of neutrons produced per fission in the medium (2.43 for uranium-235). σ f F {\displaystyle \sigma _{f}^{F}}...

Franceville in the Haut-Ogooué Province of Gabon. Several natural nuclear fission reactors were discovered in the uranium mines in the region in 1972. Some...

target is 235U, meaning a total of 4 neutrons needed to trigger fission). 233U usually fissions on neutron absorption, but sometimes retains the neutron, becoming...

the nuclear fission of uranium-235, plutonium-239, and uranium-233, (by ternary fission), with a production of about one atom per 104 fissions, meaning it...

radioactive (and less thermally useful) due to neutron activation as they are fissioned, or "burnt", in the reactor. A fresh rod of low-enriched uranium pellets...

РДС-6с; American codename: "Joe 4") was the first Soviet test of a boosted fission weapon that occurred on August 12, 1953, that detonated with an energy...

gun-type fission weapon using plutonium called Thin Man. In April 1944, the Los Alamos Laboratory determined that the rate of spontaneous fission in plutonium...

electrical power (1–10 kWe) continuously for twelve to fifteen years. The fission reactor uses uranium-235 to generate heat that is carried to the Stirling...

Atomic Energy Commission (AEC) in January 1947. The discovery of nuclear fission by Otto Hahn and Fritz Strassmann in 1938, and its theoretical explanation...

Mitochondrial fission 1 protein (FIS1) is a protein that in humans is encoded by the FIS1 gene on chromosome 7. This protein is a component of a mitochondrial...

neutrons for deformed nuclei, giving it greater stability against spontaneous fission. Hassium is a superheavy element; it has been produced in a laboratory...

material, such as uranium, which undergoes nuclear fission in a reactor. The heat energy released by the fission of nuclear fuel can be converted into electricity...

Asexual reproduction in starfish takes place by fission or through autotomy of arms. In fission, the central disc breaks into two pieces and each portion...

same element. Neutrons are also produced in the spontaneous and induced fission of certain heavy nuclides. As a consequence of the Pauli exclusion principle...

Swedish nuclear physicist who was instrumental in the discovery of nuclear fission. After completing her doctoral research in 1906, Meitner became the second...

Fission is a studio album by keyboardist Jens Johansson, released in 1997 through Heptagon Records (Europe); February 18, 1998 through Pony Canyon (Japan);...

primary decay modes before the most stable isotope, 244Pu, are spontaneous fission and alpha decay; the primary mode after is beta emission. The primary decay...

inelastic scattering reduces neutron energy below the range where fast fission of one or more next-generation nuclei is probable. Doppler broadening of...

for this discovery, the new elements were later revealed to be nuclear fission products. Fermi left Italy in 1938 to escape new Italian racial laws that...

the fission products from the nuclear fission of uranium. The longest half-lives of the radioisotopes of these elements generated by nuclear fission are...

generate free neutrons by a variety of nuclear reactions, including nuclear fission and nuclear fusion. Whatever the source of neutrons, they are released...

fission product of uranium fission, and the largest single contributor to the long-lived radioactivity of nuclear waste. Technetium-99 has a fission product...

The Fission Mine, previously known as the Richardson Deposit, is a fluoride and uranium deposit in Cardiff, near Wilberforce, Ontario, Canada. The mine...

rate of fission over time. In order to keep the fission rate constant, the neutrons released by fission must produce an equal number of fissions in other...

pp. 324–325. Gill, Matthew; Livens, Francis; Peakman, Aiden. "Nuclear Fission". In Letcher (2020), pp. 147–149. Horvath, Akos; Rachlew, Elisabeth (January...

factor (keff), the average number of all neutrons from one fission that cause another fission. ρ = ⁠keff - 1/keff⁠ But in nuclear physics, it is useful...

The Joint Evaluated Fission and Fusion (JEFF) organization is an international collaboration for the production of nuclear data. It consists of members...

A traveling-wave reactor (TWR) is a proposed type of nuclear fission reactor that can convert fertile material into usable fuel through nuclear transmutation...

enormous energy potential of nuclear fission, stating that 250 million electron volts could be released through the fission of an atomic nucleus. Heisenberg...

half-life of 9.14 hours, decaying to long-lived caesium-135. 135Xe is a fission product and it is the most powerful known neutron-absorbing nuclear poison...

less than two new neutrons from fissioning the bred plutonium. Since one neutron is required to sustain the fission reaction, this leaves a budget of...

16.1 million years); 131mXe, 133Xe, 133mXe, and 135Xe are some of the fission products of both 235U and 239Pu, so are used as indicators of nuclear explosions...

spontaneous fission with extremely short half-lives, though element 126 is hypothesized to be within an island of stability that is resistant to fission but not...

sources are the fission products from the primary fission stage, and in the case of fission-fusion-fission weapons, from the fission of the fusion stage...

bomb that would be required to instead create the necessary amount of fission. For Daedalus, this process was to be run within a large electromagnet...

an emergency shutdown of a nuclear reactor effected by terminating the fission reaction. It is also the name that is given to the manually operated kill...

the skin). However, so-called long-range alpha particles from ternary fission are three times as energetic and penetrate three times as far. The helium...

nuclear fuel sustains a fission chain reaction. A reactor achieves criticality (and is said to be critical) when each fission releases a sufficient number...

nuclear fission reactions occurred approximately 1.7 billion years ago. Founded in 2013 by Jacob and Caroline DeWitte, Oklo Inc. focuses on fast-fission power...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

radioactive fission products even during severe accidents. Each particle is coated in a porous buffer layer made of carbon that absorbs fission product recoils...

processes can occur. About 85.5% of the time, it will fission; about 14.5% of the time, it will not fission, instead emitting gamma radiation and yielding 236U...

to be completing a nuclear submarine. The VM-A reactor was the nuclear fission reactor used in pairs to power the Soviet Navy's Project 658 and 701 (Hotel)...

fission or fission of some heavier actinides will produce it at higher yields. For example, its yield from uranium-235 is 0.0007% per thermal fission...

in season Title Directed by Written by Original release date 1 1 "Gone Fission" Shawn Seet Morgan O'Neill 10 November 2023 (2023-11-10) During an AUKUS...

two types of atomic bombs: "Little Boy", an enriched uranium gun-type fission weapon, and "Fat Man", a plutonium implosion-type nuclear weapon. The 509th...

through the first artificial fission of atoms that would lead to the Manhattan Project and, eventually, to using nuclear fission to generate electricity....

biota, which are possibly the oldest multicellular life known. A natural fission reactor formed there about 1.8 - 2.1 billion years ago. The Franceville...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

In music cognition, melodic fission (also known as melodic or auditory streaming, or stream segregation), is a phenomenon in which one line of pitches...

material through its inertia, which delays the thermal expansion of the fissioning fuel mass, keeping it supercritical longer. Often the same layer serves...

pure fission weapon, exceeding the US Ivy King test, or the largest boosted fission weapon. Orange Herald was a fusion boosted British fission nuclear...

generally have long lives and be considered metastable. After fission, several of the fission fragments may be produced in a metastable isomeric state, after...

beta decay of new radioactive elements recently produced from fission fragments in the fission process. Quantitatively, at the moment of reactor shutdown...

Loop fission (or loop distribution) is a compiler optimization in which a loop is broken into multiple loops over the same index range with each taking...

fusion versus nuclear fission. Nuclear fusion accounts for most energy production in the Sun and other stars. Nuclear fission allows for decay of radioactive...

184 neutrons are expected to have much shorter lifetimes, spontaneously fissioning within 10−15 seconds. If this is so, then it would not make sense to consider...

on the design of the reactor and fuel cycle, the generated 233 U either fissions in situ or is chemically separated from the used nuclear fuel and formed...

effort started in April 1939, just months after the discovery of nuclear fission in Berlin in December 1938, but ended shortly ahead of the September 1939...

exactly one of the neutrons released from each nuclear fission event to stimulate another nuclear fission event (in another fissionable nucleus). With careful...

(PDF) on 11 October 2011. Retrieved 28 July 2011. The DPRK has implosion fission weapons. "Role of nuclear weapons grows as geopolitical relations deteriorate—new...

Fission track dating is a radiometric dating technique based on analyses of the damage trails, or tracks, left by fission fragments in certain uranium-bearing...

that is propelled by the exhausted coolant of a gaseous fission reactor. The nuclear fission reactor core may be either a gas or plasma. They may be capable...

to 10 years without the need for refueling. Microreactors use nuclear fission to generate heat, which is then used to produce electricity through a steam...

zero void coefficient. Nuclear fission reactors run on nuclear chain reactions, in which each nucleus that undergoes fission releases heat and neutrons....

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

81 mi) which caused widespread death across the city. It was a gun-type fission weapon which used uranium that had been enriched in the isotope uranium-235...

with only trace quantities existing in nature produced by spontaneous fission (there are an estimated 2.5×10−13 grams of 99Tc per gram of pitchblende)...

more powerful than nuclear fission. A pure fusion weapon is a hypothetical nuclear weapon that does not require a primary fission stage to start a fusion...

civilians. It is not to be confused with a nuclear explosion, such as a fission bomb, which produces blast effects far in excess of what is achievable...

scientists Leo Szilard (who had previously formulated an idea for non-fission chain reaction), Leona Woods, Herbert L. Anderson, Walter Zinn, Martin...

capture neutrons and itself fission as part of the thermonuclear reaction. This idea of a layered fission-fusion-fission bomb led Sakharov to call it...

assassination. Nuclear warfare, both via fission and fusion weapons, creates radioisotopes in the form of fission products and neutron-activated surface...

reports highlighted the war as the first rigorously documented "permanent fission" and subsequent "civil war" in wild chimpanzees without human intervention...

none satisfactorily explains the features of the Earth–Moon system. A fission of the Moon from Earth's crust through centrifugal force would require...

crewed interplanetary spacecraft that used the antimatter-catalyzed micro-fission (ACMF) engine as its main form of propulsion. The spacecraft was designed...

fraction of fuel atoms that underwent fission in %FIMA (fissions per initial heavy metal atom) or %FIFA (fissions per initial fissile atom) as well as...

first theoretical explanation of nuclear fission (coining the term) and first experimentally detected the fission by-products. Later, with his collaborator...

A small modular reactor (SMR) is an emergent class of nuclear fission reactors with a rated electrical power of less than 300 megawatts (MWe), which use...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

detonated on 16 October 1964, at the Lop Nur test site. It was an implosion fission device containing about 15 kg weapons-grade uranium (U-235) from Lanzhou...

radiative capture, a: absorption (radiative capture belongs to this type), f: fission, the corresponding notation for cross sections being: σ s {\displaystyle...

weapon. Very similar to Mk-24. (10–15 Megatons) Mark 18 – Very high yield fission weapon (Ivy King device). Mark 20 – Improved Mark 13 (cancelled 1954) Mark...

that of 239Pu, and a similar probability of fissioning on neutron absorption, around 73%. In the non-fission case, neutron capture produces plutonium-242...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

reactor core. In the core, water is heated by the energy released by the fission of atoms contained in the fuel. Using high pressure (around 155 bar: 2250...

government is investing in small modular reactors that operate via nuclear fission, as well as in research and development towards commercial fusion reactors...

Fermi had actually induced nuclear fission in the uranium, and that his identified "transuranics" turned out to be fission products, isotopes of much lighter...

also worked with Niels Bohr to explain the basic principles of nuclear fission. Together with Gregory Breit, Wheeler explored positron-electron pair production...

reaction to change of control rod positions. The buildup of short-lived fission products acting as nuclear poisons is called reactor poisoning, or xenon...

macronucleus disintegrates. Binary fission occurs twice, yielding four identical daughter cells. In the asexual fission phase of growth, during which cell...

based on nuclear fusion, predicting it would be more destructive than the fission bombs being developed. A bomb test is scheduled for July 1945. Following...

does not need a fission "primary" explosive to ignite the fusion of deuterium and tritium, two heavy isotopes of hydrogen used in fission-fusion thermonuclear...

smaller than the typical fragments produced in spontaneous fission. In a nuclear fission process, the masses of the two nuclei that emerge are usually...

decays are spontaneous fission. One microgram of 252Cf emits 2.3 million neutrons per second (about 3.7 neutrons per fission). The other main isotopes...

regarding the history of the Moon was of its origin. Early hypotheses included fission from Earth, capture, and co-accretion. Today, the giant-impact hypothesis...

Resembling lava in consistency, it consists of a mixture of nuclear fuel, fission products, control rods, structural materials from the affected parts of...

239Pu–240Pu–gallium (96%–1%–3% by molarity). A fission chain reaction then begins. The tendency of the fissioning pit to blow itself apart prematurely is reduced...

across Europe and North America following the 1938 discovery of nuclear fission. The sole supply of heavy water was from the Vemork hydroelectric power...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

Central Pacific Ocean. This test explosion was the first test of a boosted fission weapon, and the second instance of artificial thermonuclear fusion, following...

radiation that presents as free neutrons. Typical phenomena are nuclear fission or nuclear fusion causing the release of free neutrons, which then react...

indicates little recruitment and fission is the primary means of reproduction in this species. In this species, fission appears to start with the softening...

generated within the Earth. The most common fuel used in conventional nuclear fission power stations, uranium-235 is "non-renewable" according to the United...

sources in the atmosphere and by natural fission of the actinides. Today, however, most is artificial as fission product; like krypton-85 the contribution...

them cannot exceed 10−10. A nuclear fission reactor produced around 1020 electron antineutrinos per second. Fission of 235 U, as well as 238 U,239 Pu and...

number also include radioactive decay by alpha radiation or spontaneous fission. The shape of the valley is roughly an elongated paraboloid corresponding...

using a thermoelectric generator) miniaturized fission reactors (usually produce heat by controlled fission of highly enriched 235 U and convert it to electricity...

divided by the rate of fission. The numbers are a weighted average based primarily on the energies of the neutrons. Nuclear fission is a process in which...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

nuclear fission. News of the discovery spread quickly among physicists and it was realized that if chain reactions could be controlled, fission might be...

nuclear fission. George Placzek, who was skeptical about the whole idea of fission, challenged Bohr to explain why uranium seemed to fission with both...

Central Himalaya and Recycling in the Foreland Basin Assessed by Apatite Fission-Track Thermochronology of Siwalik Sediments, Nepal" (PDF). Basin Research...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

Ridge National Laboratory in 1945 by the separation and analysis of the fission products of uranium fuel irradiated in a graphite reactor. The discoverers...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

from fission reactions. Though the number of fissions produced in the RTG is very small (making their gamma radiation negligible), because each fission releases...

source. Some isotopes undergo spontaneous fission (SF) with emission of neutrons. The most common spontaneous fission source is the isotope californium-252...

reactions are used to cause fission reactions in a surrounding blanket of uranium or other nuclear fuel, and those fission events are responsible for most...

site isolation which they had been working on under the codename Project Fission. Despite the security benefits of this feature, it does have limitations...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

process in which a nucleus, after absorbing a gamma ray, undergoes nuclear fission and splits into two or more fragments. The reaction was discovered in 1940...

case of humans, complex language. Mammals can organize themselves into fission–fusion societies, harems, and hierarchies—but can also be solitary and...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

Fission is a Swedish melodic death metal band formed in 2002. The band began as Benny Hägglund's personal project, with the hopes of fusing melody and...

Strobilation or transverse fission is a form of asexual reproduction consisting of the spontaneous transverse segmentation of the body. It is observed...

apparently the separation of the fission and fusion components of the weapons, and to use the X-rays produced by the fission bomb to first compress the fusion...

causing it to split (the fission reaction). The resulting shower of neutrons can cause the surrounding fuel to undergo rapid fission or even nuclear fusion...

nuclear magnetic resonance; the first nuclear pile; the first nuclear fission reaction in the Americas; the first evidence for plate tectonics and continental...

mass of the reactor. A fusion rocket may produce less radiation than a fission rocket, reducing the shielding mass needed. The simplest way of building...

Dynamin-1-like protein is a GTPase that regulates mitochondrial fission. In humans, dynamin-1-like protein, which is typically referred to as dynamin-related...

depletion of 235U and the characteristic isotope ratios of fission products confirm that fission had occurred. Frank and Schmidt speculated that such a civilization...

make this possible. The car was to use a steam engine powered by uranium fission, similar to those found in nuclear submarines. The Nucleon was not a serious...

were fission events. A plutonium fission event produces, on average, 2.9 neutrons, most of which are consumed in the production of more fission, until...

energy released, and the amount of fission yield was also strictly controlled. Fission, primarily "fast" fission of the natural uranium tamper surrounding...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

shock of a fission weapon to compress more fissionable material to extremely high densities in order to make megaton-range, two-stage fission bombs. He...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

31 countries generate 10 percent of the world's energy through nuclear fission. In the future, it is expected that nuclear fusion will add another nuclear...

men." In 1943, development efforts were directed to a plutonium gun-type fission weapon called "Thin Man". Initial research on the properties of plutonium...

project during the Second World War was the technical utilization of nuclear fission, which had been experimentally researched by Otto Hahn and Fritz Straßmann...

Irradiation causes a build-up of fission products and transuranic elements (generated by capture of neutrons) in the fuel. Fission products typically have a...

study and use of nuclear power. This is primarily limited to sustained fission and decay processes, and does not include detailed timelines of nuclear...

Lyrical themes explored by the band include personal development. -!- (2021) Fission (2024) Haviland (2013) Weapons (2013) Axiom (2015) Dempsey (2016) Duguay...

form to manipulate Ben into killing Jacob. In 1977, Juliet detonates the fission core taken from the hydrogen bomb. Season 6, the final season, also follows...

ionizing radiation is a radioactive material or a nuclear process such as fission or fusion, there is particle radiation to consider. Particle radiation...

2065. In nuclear-reactor operation, most heat is generated by nuclear fission, but over 6% comes from radioactive decay, which continues after the reactor...

isotope, caesium-133. Caesium is mined mostly from pollucite. Caesium-137, a fission product, is extracted from waste produced by nuclear reactors. It has the...

quantities of an element, using the neutron flux from a fission reactor or fusion reactor. In the fission context, breeding blankets have been used since the...

radioactive due to its substantial uranium content and contamination by fission products, however it is not any more radioactive than the corium itself...

because 131I is a major fission product of uranium and plutonium, comprising nearly 3% of the total products of fission (see fission product yield). Due to...

applied to other sources of heat energy, such as nuclear energy (via nuclear fission and nuclear fusion). The heat energy released by reactions of fuels can...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

theorized Teller-Ulam design. The vast majority of its yield derived from fission. The energy output from the thermonuclear fusion in this test was insignificant...

nuclear technology relying on fission requires naturally occurring radioactive material as fuel. Uranium, the most common fission fuel, is present in the ground...

for interstellar travel. The fission sail is a type of spacecraft propulsion proposed by Robert Forward that uses fission fragments to propel a large solar...

In chemistry, heterolysis or heterolytic fission (from Greek ἕτερος (heteros) 'different' and λύσις (lusis) 'loosening') is the process of cleaving/breaking...

done improperly, the process of combining nuclear products can produce a fission reaction which, in turn, produces radiation. In order to enrich the fuel...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

at Aldermaston produced three designs: Orange Herald, a large boosted fission weapon; Green Bamboo, an interim thermonuclear design; and Green Granite...

These nuclides are described as geogenic, meaning that they are decay or fission products of uranium or other actinides in subsurface rocks. All such nuclides...

Mitochondria are dynamic organelles with the ability to fuse and divide (fission), forming constantly changing tubular networks in most eukaryotic cells...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

conjoined twins have been proposed. The one that is generally accepted is fission, in which the fertilized egg splits partially. The other explanation, no...

generators, primarily driven by heat engines fueled by combustion or nuclear fission, but also by other means such as the kinetic energy of flowing water and...

the lowest atomic number known (almost surely) to undergo spontaneous fission as the main decay mode Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S...

uranium-238 did not fission readily with slow, moderated neutrons, it might still fission with the fast neutrons produced by fission. This effect was small...

physics involved in a nuclear explosion and had to be reassured that the fission reactions from the Bikini Atoll tests would not spread through the oceans...

1955, Ulam co-authored a classified paper proposing the use of nuclear fission bombs, "ejected and detonated at a considerable distance", for propelling...

Fritz Strassmann discovered nuclear fission, for which Hahn received the 1944 Nobel Prize for Chemistry. Nuclear fission was the basis for nuclear reactors...

MIEF2 gene. The MID49 protein is used to assist in mitochondrial binary fission. It is a dynamic peripheral protein receptor found on the surface of the...

radionuclides of technological importance are produced as fission products within nuclear reactors. A fission product is a nucleus with approximately half the...

The OK-650 reactor is the nuclear fission reactor used for powering the Soviet Navy's Project 685 Плавник/Plavnik (Mike), Project 971 Щука-Б/Shchuka-B...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

fission span a wide range, but every one will quickly (in geologic time) decay either to a primordial nuclide or one of the seven long-lived fission products...

won several awards for his project titled "Fission Vision: The Detection of Prompt and Delayed Induced Fission Gamma Radiation, and the Application to the...

of small, supercritical fission/fusion pulses behind an object in space. Bimodal nuclear thermal rockets conduct nuclear fission reactions similar to those...

is more abundant than uranium. The neutrons needed for sustaining the fission process would be provided by a particle accelerator producing neutrons...

transformed into a neutron, thus moving towards a stable isotope; however, since fission almost always produces products which are neutron heavy, positron emission...

shelters. Fission products are more deadly than neutron-activated cobalt in the first few weeks following detonation. After one to six months, the fission products...

fertilizers, airplanes, computers, automobiles, contraceptive pills, nuclear fission, the green revolution, radio, scientific plant breeding, rockets, air conditioning...

most proposals use fusion power, as with conventional Bussard ramjets, fission has also been suggested. The advantages of this system include: Fusion...

reactor Prototype) was a U.S. research program for nuclear fission reactors usable as small fission power systems for spacecraft. It was started in 1983 by...

against spontaneous fission as a consequence of greater fission barrier heights near the shell closure. Due to the expected high fission barriers, any nucleus...

extraction thruster Pulsed plasma thruster Project Prometheus Safe Affordable Fission Engine Systems for Nuclear Auxiliary Power TOPAZ nuclear reactor Ad Astra...

decay or spontaneous fission) trapped within sediment and meteorite samples dating billions of years ago. Carbonaceous chondrite fission xenon (CCF Xe), are...

Propulsion Workshop (2001), The Safe Affordable Fission Engine (SAFE) Test Series) NASA (2010), Small Fission Power System Feasibility Study Final Report...

Geochronology is the science of determining the age of rocks, fossils, and sediments using signatures inherent in the rocks themselves. Absolute geochronology...

of the rock. Common isotopic systems used for thermochronology include fission track dating in zircon, apatite, titanite, natural glasses, and other uranium-rich...

to decay by β+β+ to 102Ru with a half-life over 7.6×1018 y Fission product Long-lived fission product Cosmogenic nuclide, also found as nuclear contamination...

A nuclear pumped laser is laser pumped with the energy of fission fragments. The lasing medium is enclosed in a tube lined with uranium-235 and subjected...

merits the element's inclusion here. Specifically from thermal neutron fission of uranium-235, e.g. in a typical nuclear reactor. Milsted, J.; Friedman...

Schizosaccharomycetales, the fission yeasts. The genus Schizosaccharomyces is a broad and ancient clade within Ascomycota including five known fission yeast: Schizosaccharomyces...

development was abandoned in 1944 after it was discovered that the spontaneous fission rate of nuclear reactor-bred plutonium was too high for use in a gun-type...

unconfirmed, analysts agree the test was likely of a thermonuclear or boosted fission weapon. The test took place at a high point of the 2017–2018 North Korea...

Nucleon pair breaking in fission has been an important topic in nuclear physics for decades. "Nucleon pair" refers to nucleon pairing effects which strongly...

neutron and fails to fission. Pu-240 and Pu-239 are not separated by reprocessing. Pu-240 has a high rate of spontaneous fission, which can cause a nuclear...

compressing fissile material in a magnetic field, a Z-pinch, until fission occurs. This fission reaction propels the craft. MMO should be able to propel 100...

direct reply to a question about fission. The speech as a whole contains large sections about the development of fission power and the difficulties that...

uranium and transuranium elements to undergo fission and produce power; so, its only waste is the nuclear fission products. These have much shorter half-lives;...

versatile and are able to change their shape through fission and fusion events. Definitively, fission is the event of a single entity breaking apart, whereas...

the B53 used oralloy (highly enriched uranium) instead of plutonium for fission, with a mix of lithium-6 deuteride fuel for fusion. The explosive lens...

elements. It was also found that some heavy elements may undergo spontaneous fission into products that vary in composition. In a phenomenon called cluster...

mass spectrometry (SIMS). Fission fragment ionization uses ionic or neutral atoms formed as a result of the nuclear fission of a suitable nuclide, for...

injuring them as well. The accident released about 1,100 curies (41 TBq) of fission products into the atmosphere, including the isotopes of xenon, isotopes...

a critical mass of around 60 kg. However, it has a low probability of fission on bombardment with thermal neutrons, which makes it unsuitable as a fuel...

optimal energy profile to split 238 92U nuclei – in other words, cause fission. There seems to be some discrepancy between "media overview" material and...

used in modeling nuclear fission reactions, and it implies that a great amount of energy can be released by the nuclear fission chain reactions used in...

of Israeli air-to-air missiles Python (nuclear primary), a gas-boosted fission primary used in thermonuclear weapons Colt Python, a revolver Python (codename)...

elements by neutron irradiation (1934) and the fission of uranium atoms by neutrons (1938). The discovery of fission led to the creation of both nuclear power...

Research reactors are nuclear fission-based nuclear reactors that serve primarily as a neutron source. They are also called non-power reactors, in contrast...

nucleus, they can fission as well, leading to a chain reaction. The average number of neutrons released per nucleus that go on to fission another nucleus...

used in nuclear weapon pits, the component of a nuclear weapon where the fission chain reaction is started. This alloy was developed during the Manhattan...

the harmonic analysis of the theory of tides as well as the discredited fission theory of the origin of the Moon. The Darwin symbols for tides are named...

designs of) the supercritical water reactor (SCWR). After the discoveries of fission, moderation and of the theoretical possibility of a nuclear chain reaction...

period had progressed from fission bomb to hydrogen bomb. Mao had urged the importance of a quick progression from fission bomb to hydrogen bomb, instructing...

never been observed despite extensive searches for it; and spontaneous fission (SF), which is theoretically possible for the nuclides with atomic mass...

require a total of 3 or 4 thermal neutrons to eventually fission, and a thermal neutron fission generates only about 2 to 3 neutrons, these nuclides represent...

neighboring nuclides (TNN). Lightest nuclide known to undergo spontaneous fission as its main decay mode Half-life not measured, not included in discovery...

produced by nuclear fission: 155Eu (half-life 4.742 years) has a fission yield of 0.033% for uranium-235 with thermal neutrons. The fission product yields...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

weapons rooting from the development of the science surrounding nuclear fission and nuclear fusion. In addition to the scientific advancements, this timeline...

keystone species, due to their impact on their environments. Elephants have a fission–fusion society, in which multiple family groups come together to socialise...

believed to decay primarily by fission, and that the experiment should be repeated, this time searching for those spontaneous fission events. This version of...

inherently unsafe, as some of the fission neutrons are emitted with a delay of seconds or even minutes (post-fission neutron emission from daughter nuclei)...

section for that reaction. Isotopes that undergo fission are fissionable fuels and have a corresponding fission cross section. The remaining isotopes will simply...

disease in humans. Ciliates reproduce asexually, by various kinds of fission. During fission, the micronucleus undergoes mitosis and the macronucleus elongates...

rupture in a nuclear reactor's fuel cladding that allows the nuclear fuel or fission products, either in the form of dissolved radioisotopes or hot particles...

occasionally undergoes spontaneous fission rather than alpha decay, but at a much lower rate than uranium-238 and all natural fission products and evidence come...

relationship with ancient prokaryotes. Mitochondria multiply by binary fission and have their own DNA contained in multiple small circular chromosomes...

half. Fission-fragment rocket (nuclear fission energy) Fission products are directly exhausted to give thrust. Theoretical only at this point. Fission sail...

Moon came to be formed. Other proposed scenarios include captured body, fission, formed together (accretion, synestia), planetesimal collisions (formed...

behaves like uranium-235, with a slightly higher cross section for fission, and its fission releases a similar amount of energy. Typically, about one percent...

operating power continues to be generated from the decay of short-half-life fission products. In conventional reactors, removing this decay heat passively...

PomBase is a model organism database that provides online access to the fission yeast Schizosaccharomyces pombe genome sequence and annotated features...

action upon the nucleus. Notable artificial sources of gamma rays include fission, such as that which occurs in nuclear reactors, and high energy physics...

years (1973–1979). Beginning in 1976, Nurse identified the gene cdc2 in fission yeast (Schizosaccharomyces pombe). This gene controls the progression of...

lower the kinetic energy of the neutrons and increase the probability that fission will occur. This allows reactors to use material with far lower concentration...

while attempting to persuade the inhabitants of their native metropolis of Fission City to imprison them. Of these mutant animals, a few sided with the Sharks...

Toshiba 4S (Super Safe, Small and Simple) is a micro sodium-cooled nuclear fission reactor design. The plant design is developed by a partnership that includes...

merits the element's inclusion here. Specifically from thermal neutron fission of uranium-235, e.g. in a typical nuclear reactor. Milsted, J.; Friedman...

per year. Nuclear power is the use of nuclear fission to generate useful heat and electricity. Fission of uranium produces nearly all economically significant...

Hypothetical interstellar propulsion systems include nuclear pulse propulsion, fission-fragment rocket, fusion rocket, beamed solar sail, and antimatter rocket...

Strontium-90 (90 Sr) is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.91 years. It undergoes β− decay into 90 Y with...

migrations to the south, resulting in a depopulation of the Central Plains, a fission between those that remained and those that headed south, and their subsequent...

tokamak with superconducting toroidal magnets T-15 1988 2.4 0.7 3.6 1 T-15MD 2021 1.48 0.67 2.0 2.0 Supports ITER, intended for fission hybrid experiments...

longer a maximum and the nuclides are therefore unstable toward spontaneous fission-type processes. In practice, this mode of decay has only been observed...

A molten-salt reactor (MSR) is a class of nuclear fission reactor in which the primary nuclear reactor coolant and/or the fuel is a mixture of molten...

that it cannot efficiently drive nuclear capsules. Antiproton-induced fission and self-generated magnetic fields may greatly enhance energy localization...

Greek ὅμοιος (homoios) 'equal' and λύσις (lusis) 'loosening') or homolytic fission is the dissociation of a molecular bond by a process where each of the...

with slow neutrons. This causes induced fission of 235U, as opposed to the spontaneous fission of 238U. The fission tracks produced by this process are recorded...

The device itself was a low fission-fraction design, meaning it produced only a small portion of its yield from fission and hence produced less fallout...

radiation in the megacurie range. There was also exposure to gasseous fission products. Workers handled irradiated slugs, sometimes directly, and suffered...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

anti-submarine weapon for Navy use was filled by using the new primary as a boosted fission weapon. Three versions were produced, A, B and C. The first to be produced...

Mississippi, and New Mexico. Includes all tests with potential for nuclear fission or fusion explosion, including combat use, singleton tests, salvo tests...

century brought a host of innovations. In physics, the discovery of nuclear fission in the Atomic Age led to both nuclear weapons and nuclear power. Analog...

leading to the Manhattan Project, a secret effort to harness nuclear fission to produce atomic bombs; the first nuclear device was detonated on July...

among other features. Other software by Rogue Amoeba includes Airfoil, Fission, Loopback, Piezo, SoundSource, Farrago, and the now-discontinued Nicecast...

produce 5 N of thrust, or 40 kW/N. This power requirement may be met by fission reactors, but the reactor mass (including heat rejection systems) may prove...

Soundproofing Radiation Actinides Bioremediation Depleted uranium Nuclear fission Nuclear fallout Plutonium Poisoning Radioactivity Uranium Radioactive waste...

further provided technical details on fission devices while addressing the local media as he puts it: "All boosted fission devices using Uranium 235 on 28 May...

that become unable to undergo mitotic division (or, for bacteria, binary fission), thus being effectively sterilized — even if they can still carry out...

published in 1953 titled "Nuclear Constitution and the Interpretation of Fission Phenomena." He was awarded his Ph.D. in 1951. After graduating from the...

gained via nuclear fission. In contrast to nuclear fission, the spallation neutrons cannot trigger further spallation or fission processes to produce...

studied in the Gombe Stream National Park, noted fission-fusion societies in chimpanzees. There is fission when the main group splits up to forage during...

and Fritz Kalckar to explain the mechanism of nuclear fission. Bohr had an epiphany that the fission at low energies was principally due to the uranium-235...

Irène's results and proved that nuclear fission was possible and replicable. In 1948, using work on nuclear fission, the Joliot-Curies, along with other...

isomer of 262Rf (which undergoes spontaneous fission with a half-life of 47 ms), and spontaneous fission activities with long lifetimes tentatively assigned...

surrounded by a ceramic coating of silicon carbide for structural integrity and fission product containment. Thousands of pebbles are amassed to create a reactor...

The OK-550 reactor is the nuclear fission reactor used to power three of the seven boats of the Soviet Navy's Project 705 Лира (Lira or Alfa in NATO designation)...

is an American privately held company that aims to commercialize both fission and fusion power in compact-scale, liquid-metal-cooled modular energy systems...

locking). Nuclear computation allows a computational thread to use thread fission to turn one thread into many or thread fusion to turn many threads into...

Columbia had assembled. Approximately 1.7 billion years ago, natural nuclear fission reactors were generating power in what is now Oklo, Gabon. Boring Billion –...

the Tsavo lion pride that always had only one adult male. Prides act as fission–fusion societies, and members split into subgroups that keep in contact...

when predators are present in order to avoid their families being seen. Fission–fusion society has been documented in a number of avian taxa including...

Retrieved 20 December 2022. Davey, J. (March 1992). "Mating Pheromones of the Fission Yeast Schizosaccharomyces pombe: Purification and Structural Characterization...

identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives...

Post-fordism and immaterial labour Green politics mostly opposes nuclear fission power and the buildup of persistent organic pollutants, supporting adherence...

requires more shielding than plutonium-238, but is cheaper as it is a fission product and is present in a high concentration in nuclear waste and can...

multiply via binary fission, like bacteria; they can also divide through budding, similarly to yeasts, or through multiple fissions, a process known as...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

stable nuclides. Many of these in theory could decay through spontaneous fission, alpha decay, double beta decay, etc. with a very long half-life, but this...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

captures, the nucleus beta-decays back to the line of stability (just as with fission products) resulting in a stable isotope of the same mass number A, and...

analysis of fission cases[clarification needed], which claims to be at least a priori possible, if not actually true of real cases of fission. Imagine an...

Thermonuclear (fusion/fission by Teller-Ulam design) bombs, often mesaured in megatons, can be hundreds of times stronger than their atomic (fission only) counterparts...

as the rest of the Castle series. Even though it used lithium fuel for fission boosting, the principal reaction material in the second stage was uranium...

Breeder Reactor successfully attains first criticality (start of controlled fission chain reaction). 6 April – The crew of Artemis II breaks the record for...

studying the fission characteristics of the compound nucleus 280Ds, produced in the reaction: 232 90Th + 48 20Ca → 280 110Ds* → fission The result revealed...

crystallography Organic chemistry (timeline) Biochemistry Nuclear chemistry Fission Fusion Power Weapons Applied chemistry Cosmetics Material science Nanotechnology...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

of nuclear fission in uranium in the January 6, 1939, issue of Die Naturwissenschaften, and Lise Meitner identified it as nuclear fission in the February...

wrote his thesis under the supervision of Richard D. Present on "Nuclear fission and the liquid drop model of the nucleus". Publication of the thesis was...

Metal Gear Solid 2: Sons of Liberty is a 2001 action-adventure stealth game developed by Konami Computer Entertainment Japan and published by Konami for...

particles such as beta particles, alpha particles, fission products, and neutrons (in nuclear fission). Thus, the process of neutron capture, even after...

in 2002. After Europa Orbiter, NASA turned its attention to a nuclear fission powered orbiter for Europa for Project Prometheus. Comparison of notional...

History of nuclear fission Sime, Ruth Lewin (2000). "The Search for Transuranium Elements and the Discovery of Nuclear Fission". Physics in Perspective...

physicist. In 1934 she was the first to mention the idea later named nuclear fission. With her husband Walter Noddack, and Otto Berg, she discovered element...

and in 1946 the two filed a secret patent outlining a scheme for using a fission bomb to compress fusion fuel to initiate nuclear fusion. The Fuchs–von...

dating. 151Sm is a medium-lived fission product and acts as a neutron poison in the nuclear fuel cycle. The stable fission product 149Sm is also a neutron...

artificial element, except in trace quantities as a product of spontaneous fission of 238U and 235U and alpha decay of 151Eu, and thus a standard atomic weight...

unavoidable result of nuclear fission and nuclear explosions. The process of nuclear fission creates a wide range of fission products, most of which are...

large scale geophysical flows involving oceans/atmosphere and modelling fission weapon detonation. Fluid dynamics offers a systematic structure—which underlies...

thermonuclear weapons. The device was named 596L as it used a similar fission core to the first Chinese nuclear test, the implosion bomb Project 596...

unicellular yeasts that do not form hyphae and reproduce by budding or fission. Dimorphic fungi can switch between a yeast phase and a hyphal phase in...

to spontaneous fission owing to the large speed of the products and to other decay channels, such as neutron emission and nuclear fission. Uranium and thorium...

radioactivity released. Includes all tests with potential for nuclear fission or fusion explosion, including combat use, singleton tests, salvo tests...

other even isotopes of plutonium it has a significant rate of spontaneous fission. Plutonium-242 is produced by successive neutron capture on 239Pu, 240Pu...

abundant, uranium ore was found to have naturally engaged in fission, forming natural nuclear fission reactors. Uranium-235 decays at a faster rate (half-life...

the first operation of an ion thruster system in orbit. It is the only fission reactor power system launched into space by the United States. The reactor...

water as a coolant and neutron moderator. Heat is produced by nuclear fission in the reactor core, and this causes the cooling water to boil, producing...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

Nuclear chain reactions in fissionable materials produce induced nuclear fission. Various nuclear fusion reactions of light elements power the energy production...

heavier ones are promethium isotopes. Neodymium is one of the more common fission products that results from the splitting of uranium-233, uranium-235, plutonium-239...

can model weapons with different explosive yields, heights of burst, and fission fractions. It can also provide estimates for the casualties of such a detonation...

The KLT-40 family are nuclear fission reactors originating from OK-150 and OK-900 ship reactors. KLT-40 were developed to power the Taymyr-class icebreakers...

was intended to alert President Roosevelt about the potential of nuclear fission. Because Einstein had previously met Lindbergh, he wrote a letter to the...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

takes place indirectly, as in conventional thermal power stations. The fission in a nuclear reactor heats the reactor coolant. The coolant may be water...

Verso. p. 654. ISBN 978-1-80429-090-3. ...the ravages of the 1980s...the fissions...brought about in order to fracture communities and proclaim that there...

137Cs and 131I. Some of these radioactive isotopes are relatively volatile fission products that can be released into the atmosphere. These particles could...

that isotope is thus cosmogenic. Cosmic rays Cosmogenic nuclide Nuclear fission Nucleosynthesis Astrophysics Spall, or spalling Spallation Spallation Neutron...

light platinum group metals—ruthenium, rhodium and palladium—are formed as fission products in nuclear reactors. With escalating prices and increasing global...

including americium, should have been present in the natural nuclear fission reactor at Oklo, but any quantities produced then would have long since...

One X to improve graphics support. Xbox 360 backward compatibility uses "Fission", a software emulator within the system software; 104 Xbox 360 titles were...

early Solar System. 107 Pd is also produced as a fission product in spontaneous or induced fission of 235 U. As it is not very mobile in the environment...

"Transforming Beaker Culture in North-West Europe: processes of fusion and fission". Proceedings of the Prehistoric Society. 71: 171–217. doi:10.1017/s0079497x00001006...

compound nuclei at high excitation energy (~40–50 MeV) that may either fission or evaporate several (3 to 5) neutrons. In cold fusion reactions, the produced...

officially announced the termination of the agreement after 10 years. A fission-based "atomic" nuclear weapon uses a fissile material to cause a nuclear...

Georgy Flerov, Soviet physicist know for his discovery of spontaneous fission and is the namesake of element 114, flerovium, and Yuri Oganessian (a nuclear...

that occurs naturally, but is of greater interest as a man-made nuclear fission product, where it is a potential radiological contaminant. The same contamination...

Alberto Carpinteri (born 23 December 1952) is an Italian engineer and physicist known for his contributions to fracture mechanics, structural engineering...

once-through fuel cycles. An SFR core produces more high-energy neutrons per fission compared to a light-water reactor core, which enables both better fissile...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

neutrons. A neutron moderator is used to slow the neutrons emitted by fission to make them more likely to be captured by the fuel. The very-high-temperature...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

States Atomic Energy Commission (AEC) declared that it had created a small fission warhead that could be deployed for frontline use by infantrymen. AEC made...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

some form of energy-manipulating abilities, usually relating to nuclear fission and atomic power. Originally created by Joe Gill and Steve Ditko during...

palladium-107. Nuclear fission produces it at a fission yield of 6.3% (thermal neutron fission of 235U), one of the most abundant fission products. Nuclear...

allows the computation of fission barriers for nuclei, which determine the stability of a nucleus against spontaneous fission. It was originally speculated...

Control rods are used in nuclear reactors to control the rate of fission of the nuclear fuel – uranium or plutonium. Their compositions include chemical...

spontaneous fission. Almost all alpha emitters have over 210 nucleons, and the lightest nuclide primarily undergoing spontaneous fission has 238. In both...

This is an annotated list of all the nuclear fission-based nuclear research reactors in the world, sorted by country, with operational status. Some "research"...

kilograms of HEU and delivering a yield of 500 kilotons, the largest pure-fission (non-thermonuclear) bomb design ever developed by the US. Mark 18 bombs...

merits the element's inclusion here. Specifically from thermal neutron fission of uranium-235, e.g. in a typical nuclear reactor. Milsted, J.; Friedman...

generated artificially by X-ray tubes, particle accelerators, and nuclear fission. Ionizing radiation is not immediately detectable by human senses, so instruments...

increase because of the formation of noble gases (krypton and xenon) by the fission process. If a Loss-of-coolant accident (LOCA) (e.g. Three Mile Island)...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

of the above features: It is always closed and keeps the fuel and the fission products inside and is not open before arriving at the reprocessing plant...

Georgy Flyorov, a physicist, for the fundamental discovery of spontaneous fission of uranium in 1940, Petrzhak's career in physics was then spent mostly...

field without a hand lens or microscope. They can reproduce asexually by fission (splitting in half). Other very small jellyfish, which have bells about...

improved operator interfaces. Nuclear reactors power aircraft carriers by the fission of enriched uranium to boil water, causing turbines to turn and generate...

agency, Do Big Things. Before founding Do Big Things, Contee co-founded Fission Strategy and Attentive.ly. In 2019, Contee released her book, “Mechanical...

(30 by 41 to 46 cm), probably the final fission-only W81 concept, corresponding with the size of the B61 fission primary alone. The LASL image clearly shows...

atomic bombs were developed during the war. A relatively simple gun-type fission weapon was made using uranium-235, an isotope that makes up only 0.7 percent...

Ivy King was the largest fission nuclear weapon to not attempt fusion boosting, yielding 500 kilotons of TNT. It was tested on November 16, 1952, on Enewetak...

with a half-life of 39.3 hours. Einsteinium has a high rate of nuclear fission that results in a low critical mass. This mass is 9.89 kilograms for a...

simultaneously deforming it into a projectile. Nuclear: A runaway nuclear fission (fission bomb) or nuclear fusion (Thermonuclear weapon) reaction causes immense...

development goals, he should lay the groundwork for an advanced nuclear fission energy program. After a team was assembled, relevant literature reviewed...

international physics community. In order for the fission process to chain react, the neutrons created by uranium fission must be slowed down by interacting with...

electron and an antineutrino. β− decay commonly occurs among the neutron-rich fission byproducts produced in nuclear reactors. Free neutrons also decay via this...

which then quickly goes to 239Pu, or, very rarely, spontaneous fission. The fission rate is about 60% that of americium-241 or about 0.7/g/s. As for...

yield of the weapon, the fission yield of the weapon, the height of burst of the weapon, and meteorological conditions. Fission weapons and many thermonuclear...

the Empire of Japan had several programs exploring the use of nuclear fission for military technology, including nuclear reactors and nuclear weapons...

landmarks in fission nuclear weaponry development, including having designed and developed the smallest, most powerful, and most efficient fission weapons...

Columbia University team which made the first demonstration of nuclear fission in the United States. During the Manhattan Project, he worked on gaseous...

sensors and systems. This includes physics research in support of nuclear fission and nuclear fusion energy. It is a primary supplier of the US stockpile...

both ways. The longest-lived radioisotopes of antimony are: the minor fission product 125Sb, with a half-life of 2.758 years; 124Sb, with half-life 60...

as was previously thought. Related females often live in a so-called "fission-fusion society"; that is, they share a common area and occasionally meet...

subcritical mass of fissile material critical or increase the amount of nuclear fission that a critical or supercritical mass will undergo. Such an effect was...

known species of archaea does both. Archaea reproduce asexually by binary fission, fragmentation, or budding; unlike bacteria, no known species of Archaea...

feldspar, quartz and muscovite, among other minerals, using petrographic, fission track dating and γ-spectrometric (HPGe) techniques in order to study the...

Assembly on December 8, 1953, advocating for constructive use of nuclear fission for electrical energy and nuclear medicine instead of nuclear arms race...

water reactor Subcritical fission bomb Supercritical water reactor Supercritical carbon dioxide reactor Transplutonic fission bomb Traveling wave reactor...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

and increases reliability. The high reactivity of fluorine traps most fission reaction byproducts. It appeared that the fluid salt would permit on-site...

24 hours. The same source suggests that the fission yield was 5·1018 fissions (1.95mg of U-235 fissioned) which would deliver 156 MJ (37.3kg TNT equivalent)...

nuclear fission than to be captured by uranium-238. If at least one neutron from the U-235 fission strikes another nucleus and causes it to fission, then...

The BM-40A reactor is the nuclear fission reactor used to power four of the seven boats of the Soviet Navy's Project 705 Лира (Lira or Alfa in NATO designation)...

yield derived from fission. The energy output from the thermonuclear fusion in this test was insignificant in comparison. The fission component was a unique...

translating AGG to lysine. Mitochondria divide by mitochondrial fission, a form of binary fission that is also done by bacteria although the process is tightly...

example being the discrete arrangement of bipolar microtubule bundles in fission yeast). In addition to the basic known functions of +TIPs, the proteins...

preferential parallel cousin marriage as leading to social fission, in the sense that "feud and fission are not at all dysfunctional factors but are necessary...

importance in nuclear bombs, or that it was used in the building of boosted fission weapons. Almost as soon as the stories appeared, people started attempting...

elements in the proper operation of a nuclear weapon is initiation of the fission chain reaction at the proper time. To obtain a significant nuclear yield...

went on to father the emerging nuclear chemistry and discovered nuclear fission. The electronic theory of chemical bonds and molecular orbitals was developed...

Critical mass is the amount of fissile material needed to sustain nuclear fission. Critical mass may also refer to: Critical mass (sociodynamics), a stage...

Upshot–Knothole and codenamed Shot GRABLE, a 280 mm (11 inch) shell with a gun-type fission warhead was fired 10,000 m (6.2 miles) and detonated 160 m (525 ft) above...

The neutrons used to cause fission in uranium are considered slow neutrons, but when neutrons are released during a fission reaction they are released...

Theory of relativity Quantum field theory Unified field theory Nuclear Fission F. K. Richtmyer; E. H. Kennard; T. Lauristen (1955). Introduction to Modern...

independent animal-like organism produced asexually, as by budding or fission. Siphonophorae for colonial Hydrozoa which superficially resemble the other...

Telegraph. Retrieved August 17, 2023. Linden, Grace (August 12, 2023). "Fission and Fusion: On Ann Patchett's "Tom Lake"". Los Angeles Review of Books...

radioactive decay of atoms: The weak interaction participates in nuclear fission and nuclear fusion. The theory describing its behaviour and effects is...

fired the highest-yield (500 kilotons) nuclear fission (A-bomb) weapon to date using only nuclear fission (no fusion nor fusion boosting). This test used...

Bethe–Feynman efficiency formula, a simple method for calculating the yield of a fission bomb, was first derived in 1943 after development in 1942. Aspects of the...

water by ciliary motion, eating food by engulfment, and reproducing by fission or budding, placozoans are described as "the simplest animals on Earth"...

stable: 74Se, 76Se, 77Se, 78Se, and 80Se. The last three also occur as fission products, along with 79Se, which has a half-life about 330,000 years, and...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

of Heavy Industry. On 10 October 1932 the first experiments in nuclear fission in the Soviet Union were conducted here. The Soviet nuclear physicists...

failed. Later, after fission was discovered in 1938, Szilárd immediately realized the possibility of using neutron-induced fission as the particular nuclear...

undergoes spontaneous fission with a half-life of just 370(14) microseconds; 259Fm and 260Fm also undergo spontaneous fission (t1/2 = 1.5(3) s and 4 ms...

crystallography Organic chemistry (timeline) Biochemistry Nuclear chemistry Fission Fusion Power Weapons Applied chemistry Cosmetics Material science Nanotechnology...

re-evaluated for the effects of the fission products it held, some of which were very neutron poisonous to the desired level of fission. The next two cores were...

was a Soviet physicist who is known for his discovery of spontaneous fission and his important contribution towards crystallography and material science...

among a male sexual brood that hatches at a later date. When the colony fissions, there are two ways new queens are decided. A possible outcome is a new...

Bethe developed the Bethe–Feynman formula for calculating the yield of a fission bomb, which built upon previous work by Robert Serber. As a junior physicist...

Pulsed nuclear thermal rocket‎ Fusion rocket Bussard ramjet Fission-fragment rocket Fission sail External power Beam-powered propulsion Laser propulsion...

the sample as it is produced. In turn, the 99Mo is usually created by fission of highly enriched uranium in a small number of research and material testing...