Radyum izotopları
Radyumun (88 Ra) bilinen izotopları , 202 Ra ile 234 Ra aralığında ve tamamı radyoaktif olup toplamda 33 tanedir. Yarı ömrü 1600 yıl olan 226 Ra en kararlı ve en yaygın bulunan radyum izotopudur.[ 1] [ 2] [ 3] [ 4]
İzotoplar
Nüklit
Tarihî adı
Z
N
İzotop kütlesi (Da )
Yarı ömür
Bozunma türü
Yavru izotop
Spin ve parite
İzotop çokluğu
202 Ra
88
114
202,00989(7)
2,6(21) ms [0,7(+33-3) ms]
0+
203 Ra
88
115
203,00927(9)
4(3) ms
α
199 Rn
(3/2-)
β+ (nadir)
203 Fr
203m Ra
220(90) keV
41(17) ms
α
199 Rn
(13/2+)
β+ (nadir)
203 Fr
204 Ra
88
116
204,006500(17)
60(11) ms [59(+12-9) ms]
α (%99,7)
200 Rn
0+
β+ (%0,3)
204 Fr
205 Ra
88
117
205,00627(9)
220(40) ms [210(+60-40) ms]
α
201 Rn
(3/2-)
β+ (nadir)
205 Fr
205m Ra
310(110)# keV
180(50) ms [170(+60-40) ms]
α
201 Rn
(13/2+)
İG (nadir)
205 Ra
206 Ra
88
118
206,003827(19)
0,24(2) s
α
202 Rn
0+
207 Ra
88
119
207,00380(6)
1,3(2) s
α (%90)
203 Rn
(5/2-, 3/2-)
β+ (%10)
207 Fr
207m Ra
560(50) keV
57(8) ms
İG (%85)
207 Ra
(13/2+)
α (%15)
203 Rn
β+ (%0,55)
207 Fr
208 Ra
88
120
208,001840(17)
1,3(2) s
α (%95)
204 Rn
0+
β+ (%5)
208 Fr
208m Ra
1800(200) keV
270 ns
(8+)
209 Ra
88
121
209,00199(5)
4,6(2) s
α (%90)
205 Rn
5/2-
β+ (%10)
209 Fr
210 Ra
88
122
210,000495(16)
3,7(2) s
α (%96)
206 Rn
0+
β+ (%4)
210 Fr
210m Ra
1800(200) keV
2,24 μs
(8+)
211 Ra
88
123
211,000898(28)
13(2) s
α (%97)
207 Rn
5/2(-)
β+ (%3)
211 Fr
212 Ra
88
124
211,999794(12)
13,0(2) s
α (%85)
208 Rn
0+
β+ (%15)
212 Fr
212m1 Ra
1958,4(5) keV
10,9(4) μs
(8)+
212m2 Ra
2613,4(5) keV
0,85(13) μs
(11)-
213 Ra
88
125
213,000384(22)
2,74(6) dk
α (%80)
209 Rn
1/2-
β+ (%20)
213 Fr
213m Ra
1769(6) keV
2,1(1) ms
İG (%99)
213 Ra
17/2-#
α (%1)
209 Rn
214 Ra
88
126
214,000108(10)
2,46(3) s
α (%99,94)
210 Rn
0+
β+ (%0,06)
214 Fr
215 Ra
88
127
215,002720(8)
1,55(7) ms
α
211 Rn
(9/2+)#
215m1 Ra
1877,8(5) keV
7,1(2) μs
(25/2+)
215m2 Ra
2246,9(5) keV
1,39(7) μs
(29/2-)
215m3 Ra
3756,6(6)+X keV
0,555(10) μs
(43/2-)
216 Ra
88
128
216,003533(9)
182(10) ns
α
212 Rn
0+
EY (%1×10−8 )
216 Fr
217 Ra
88
129
217,006320(9)
1,63(17) μs
α
213 Rn
(9/2+)
218 Ra
88
130
218,007140(12)
25,2(3) μs
α
214 Rn
0+
β+ β+ (nadir)
218 Rn
219 Ra
88
131
219,010085(9)
10(3) ms
α
215 Rn
(7/2)+
220 Ra
88
132
220,011028(10)
17,9(14) ms
α
216 Rn
0+
221 Ra
88
133
221,013917(5)
28(2) s
α
217 Rn
5/2+
Eser[ a]
KB (%1,2×10−10 )
207 Pb14 C
222 Ra
88
134
222,015375(5)
38,0(5) s
α
218 Rn
0+
KB (%3×10−8 )
208 Pb14 C
223 Ra
Actinium X
88
135
223,0185022(27)
11,43(5) g
α
219 Rn
3/2+
Eser[ b]
KB (%6,4×10−8 )
209 Pb14 C
224 Ra
Thorium X
88
136
224,0202118(24)
3,6319(23) g
α
220 Rn
0+
Eser[ c]
KB (%4,3×10−9 )
210 Pb14 C
225 Ra
88
137
225,023612(3)
14,9(2) g
β-
225 Ac
1/2+
Eser[ a]
226 Ra
Radyum[ d]
88
138
226,0254098(25)
1600(7) y
α
222 Rn
0+
Eser[ e]
β- β- (nadir)
226 Th
KB (%2,6×10−9 )
212 Pb14 C
227 Ra
88
139
227,0291778(25)
42,2(5) dk
β-
227 Ac
3/2+
228 Ra
Mezotoryum 1
88
140
228,0310703(26)
5,75(3) y
β-
228 Ac
0+
Eser[ c]
229 Ra
88
141
229,034958(20)
4,0(2) dk
β-
229 Ac
5/2(+)
230 Ra
88
142
230,037056(13)
93(2) dk
β-
230 Ac
0+
231 Ra
88
143
231,04122(32)#
103(3) s
β-
231 Ac
(5/2+)
231m Ra
66,21(9) keV
~53 μs
(1/2+)
232 Ra
88
144
232,04364(30)#
250(50) s
β-
232 Ac
0+
233 Ra
88
145
233,04806(50)#
30(5) s
β-
233 Ac
1/2+#
234 Ra
88
146
234,05070(53)#
30(10) s
β-
234 Ac
0+
Notlar
# ile işaretlenen değerler tamamen deneyler sonucu elde edilen veriler değildir ve kısmen sistematik eğilimle göre belirlenmiştir.
Kaynakça
^ de Laeter, John Robert ; Böhlke, John Karl; De Bièvre, Paul; Hidaka, Hiroshi; Peiser, H. Steffen; Rosman, Kevin J. R.; Taylor, Philip D. P. (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry . 75 (6): 683-800. doi :10.1351/pac200375060683 .
^ Wieser, Michael E. (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry (İngilizce). 78 (11): 2051-2066. doi :10.1351/pac200678112051 . Diğer özet .
^ Holden, Norman E. (2004). "11. Table of the Isotopes". Lide, David R. (Ed.). CRC Handbook of Chemistry and Physics (İngilizce) (85. bas.). Boca Raton, Florida : CRC Press . ISBN 978-0-8493-0485-9 .
^ Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties" , Nuclear Physics A (İngilizce), cilt 729, ss. 3-128, Bibcode :2003NuPhA.729....3A , doi :10.1016/j.nuclphysa.2003.11.001 , 2 Nisan 2015 tarihinde kaynağından arşivlendi , erişim tarihi: 11 Mayıs 2021