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Shouldn't the verify tag be on the main page? --Keflavich 19:54, 1 April 2006 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2006-04-01T19:54:00.000Z","author":"Keflavich","type":"comment","level":1,"id":"c-Keflavich-2006-04-01T19:54:00.000Z-Location_of_verify_tag","replies":[]}}-->

yes --Bmk 13:29, 20 July 2006 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2006-07-20T13:29:00.000Z","author":"Bmk","type":"comment","level":1,"id":"c-Bmk-2006-07-20T13:29:00.000Z-Location_of_verify_tag","replies":[]}}-->

In the formula ${\displaystyle R=\Phi \ \sigma \ N_{A}}$, the units do not seem to fit if I take ${\displaystyle N_{A}}$ as a density (number of atoms per volume). It should probably be the total number of atoms, but someone should check this. --149.217.1.6 14:31, 16 April 2007 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2007-04-16T14:31:00.000Z","author":"149.217.1.6","type":"comment","level":1,"id":"c-149.217.1.6-2007-04-16T14:31:00.000Z-Units_don't_fit_together","replies":[]}}-->

Just discovered that when I tried to find translations and got nothing ... then I went from the foreign language page and got to the Cross section (physics) article ... -andy 92.230.14.202 (talk) 11:47, 29 October 2008 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2008-10-29T11:47:00.000Z","author":"92.230.14.202","type":"comment","level":1,"id":"c-92.230.14.202-2008-10-29T11:47:00.000Z-Double_article","replies":[]}}-->

"The concept of a nuclear cross section is somewhat difficult to conceptualize[citation needed]" - Maybe the worst "citation needed" I've seen on wikipedia, definitely on a physics page - I very rarely comment in talk pages but whoever put it in needs to get a life or a brain, one of the two

I'm can't find any information about cros section of decay processes in particle physics. Take a positron and an electron and let them collide at centre of mass energy 91 GeV, you'll get a Z0 boson. This was done at LEP on the OPAL detector. And when the Z0 decays it can decay in e+e- or myons or quarks (hadrons). And each of these decay process has it's own cross section, these were measured in the LEP experiments.

My question is: How can I imagine a cross section of a decay process? I mean, there's nothing that collides within a cross section. There's only one single particle that decays randomly into other particles. Why does it have a cross section? Or even: Why does it need a cross section? --217.83.205.121 (talk) 14:41, 16 July 2010 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2010-07-16T14:41:00.000Z","author":"217.83.205.121","type":"comment","level":1,"id":"c-217.83.205.121-2010-07-16T14:41:00.000Z-Cross_section_of_a_decay_process?","replies":["c-Rod57-2020-11-08T11:50:00.000Z-217.83.205.121-2010-07-16T14:41:00.000Z"]}}-->

Good point. Do you have a link to anything talking about cross sections of decay processes, to give context ? ISTM The Z0 decay branches would each just have a probability (and Z0 would have a half life). Maybe what they did was take the XS for [e+,e- @ 91 GeV] and split it between the Z0 decay branches and other products. - Rod57 (talk) 11:50, 8 November 2020 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2020-11-08T11:50:00.000Z","author":"Rod57","type":"comment","level":2,"id":"c-Rod57-2020-11-08T11:50:00.000Z-217.83.205.121-2010-07-16T14:41:00.000Z","replies":[]}}-->

What is the nuclear cross sections? RAKA MOHAPATRA (talk) 18:55, 23 February 2020 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2020-02-23T18:55:00.000Z","author":"RAKA MOHAPATRA","type":"comment","level":1,"id":"c-RAKA_MOHAPATRA-2020-02-23T18:55:00.000Z-Nuclar_chemistry","replies":[]}}-->

It could be more prominently noted that the units are very different : 1/length vs area. The "macroscopic cross section" seems more like the inverse of the thickness of material needed to have some chance of the reaction happening. Do any text books explain it like that, and say what the chance is ? - Rod57 (talk) 12:12, 8 November 2020 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2020-11-08T12:12:00.000Z","author":"Rod57","type":"comment","level":1,"id":"c-Rod57-2020-11-08T12:12:00.000Z-Macroscopic_cross_section_could_be_further_explained","replies":[]}}-->

It explains nothing. To confuse things even more a "characteristic area" is introduced, but never explained (too). And what is a (n,gamma)-reaction? JUST TERRIBLE ALL TOGETHER. — Preceding unsigned comment added by Koitus~nlwiki (talk • contribs) 15:24, 6 July 2021 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2021-07-06T15:24:00.000Z","author":"Koitus~nlwiki","type":"comment","level":1,"id":"c-Koitus~nlwiki-2021-07-06T15:24:00.000Z-Really_bad_article","replies":[]}}-->