氡的同位素
| ||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||
氡有34个已知的同位素,均具有放射性,其中最稳定的为222Rn。
图表[编辑]
符号 | 历史 名称 |
Z( p ) |
N( n ) |
同位素质量(u) | 半衰期 | 衰变 方式[1] |
衰变 产物 |
原子核 自旋 |
相对丰度 (莫耳分率) |
相对丰度 (莫耳分率) |
---|---|---|---|---|---|---|---|---|---|---|
激发能量 | ||||||||||
195Rn | 86 | 109 | 195.00544(5) | 6 ms | 3/2−# | |||||
195mRn | 50(50) keV | 6 ms | 13/2+# | |||||||
196Rn | 86 | 110 | 196.002115(16) | 4.7(11) ms [4.4(+13−9) ms] |
α | 192Po | 0+ | |||
β+ (不常见) | 196At | |||||||||
197Rn | 86 | 111 | 197.00158(7) | 66(16) ms [65(+23−14) ms] |
α | 193Po | 3/2−# | |||
β+ (不常见) | 197At | |||||||||
197mRn | 200(60)# keV | 21(5) ms [19(+8−4) ms] |
α | 193Po | (13/2+) | |||||
β+ (不常见) | 197At | |||||||||
198Rn | 86 | 112 | 197.998679(14) | 65(3) ms | α (99%) | 194Po | 0+ | |||
β+ (1%) | 198At | |||||||||
199Rn | 86 | 113 | 198.99837(7) | 620(30) ms | α (94%) | 195Po | 3/2−# | |||
β+ (6%) | 199At | |||||||||
199mRn | 180(70) keV | 320(20) ms | α (97%) | 195Po | 13/2+# | |||||
β+ (3%) | 199At | |||||||||
200Rn | 86 | 114 | 199.995699(14) | 0.96(3) s | α (98%) | 196Po | 0+ | |||
β+ (2%) | 200At | |||||||||
201Rn | 86 | 115 | 200.99563(8) | 7.0(4) s | α (80%) | 197Po | (3/2−) | |||
β+ (20%) | 201At | |||||||||
201mRn | 280(90)# keV | 3.8(1) s | α (90%) | 197Po | (13/2+) | |||||
β+ (10%) | 201At | |||||||||
IT (<1%) | 201Rn | |||||||||
202Rn | 86 | 116 | 201.993263(19) | 9.94(18) s | α (85%) | 198Po | 0+ | |||
β+ (15%) | 202At | |||||||||
203Rn | 86 | 117 | 202.993387(25) | 44.2(16) s | α (66%) | 199Po | (3/2−) | |||
β+ (34%) | 203At | |||||||||
203mRn | 363(4) keV | 26.7(5) s | α (80%) | 199Po | 13/2(+) | |||||
β+ (20%) | 203At | |||||||||
204Rn | 86 | 118 | 203.991429(16) | 1.17(18) min | α (73%) | 200Po | 0+ | |||
β+ (27%) | 204At | |||||||||
205Rn | 86 | 119 | 204.99172(5) | 170(4) s | β+ (77%) | 205At | 5/2− | |||
α (23%) | 201Po | |||||||||
206Rn | 86 | 120 | 205.990214(16) | 5.67(17) min | α (62%) | 202Po | 0+ | |||
β+ (38%) | 206At | |||||||||
207Rn | 86 | 121 | 206.990734(28) | 9.25(17) min | β+ (79%) | 207At | 5/2− | |||
α (21%) | 203Po | |||||||||
207mRn | 899.0(10) keV | 181(18) µs | (13/2+) | |||||||
208Rn | 86 | 122 | 207.989642(12) | 24.35(14) min | α (62%) | 204Po | 0+ | |||
β+ (38%) | 208At | |||||||||
209Rn | 86 | 123 | 208.990415(21) | 28.5(10) min | β+ (83%) | 209At | 5/2− | |||
α (17%) | 205Po | |||||||||
209m1Rn | 1173.98(13) keV | 13.4(13) µs | 13/2+ | |||||||
209m2Rn | 3636.78(23) keV | 3.0(3) µs | (35/2+) | |||||||
210Rn | 86 | 124 | 209.989696(9) | 2.4(1) h | α (96%) | 206Po | 0+ | |||
β+ (4%) | 210At | |||||||||
210m1Rn | 1690(15) keV | 644(40) ns | 8+# | |||||||
210m2Rn | 3837(15) keV | 1.06(5) µs | (17)− | |||||||
210m3Rn | 6493(15) keV | 1.04(7) µs | (22)+ | |||||||
211Rn | 86 | 125 | 210.990601(7) | 14.6(2) h | α (72.6%) | 207Po | 1/2− | |||
β+ (27.4%) | 211At | |||||||||
212Rn | 86 | 126 | 211.990704(3) | 23.9(12) min | α | 208Po | 0+ | |||
213Rn | 86 | 127 | 212.993883(6) | 19.5(1) ms | α | 209Po | (9/2+) | |||
214Rn | 86 | 128 | 213.995363(10) | 0.27(2) µs | α | 210Po | 0+ | |||
214mRn | 4595.4 keV | 245(30) ns | (22+) | |||||||
215Rn | 86 | 129 | 214.998745(8) | 2.30(10) µs | α | 211Po | 9/2+ | |||
216Rn | 86 | 130 | 216.000274(8) | 45(5) µs | α | 212Po | 0+ | |||
217Rn | 86 | 131 | 217.003928(5) | 0.54(5) ms | α | 213Po | 9/2+ | |||
218Rn | 86 | 132 | 218.0056013(25) | 35(5) ms | α | 214Po | 0+ | 痕量[n 1] | ||
219Rn | 锕射气 | 86 | 133 | 219.0094802(27) | 3.96(1) s | α | 215Po | 5/2+ | 痕量[n 2] | |
220Rn | 钍射气 | 86 | 134 | 220.0113940(24) | 55.6(1) s | α | 216Po | 0+ | 痕量[n 3] | |
221Rn | 86 | 135 | 221.015537(6) | 25.7(5) min | β− (78%) | 221Fr | 7/2(+) | |||
α (22%) | 217Po | |||||||||
222Rn | 镭射气 | 86 | 136 | 222.0175777(25) | 3.8235(3) d | α | 218Po | 0+ | 痕量[n 1] | |
223Rn | 86 | 137 | 223.02179(32)# | 24.3(4) min | β− | 223Fr | 7/2 | |||
224Rn | 86 | 138 | 224.02409(32)# | 107(3) min | β− | 224Fr | 0+ | |||
225Rn | 86 | 139 | 225.02844(32)# | 4.66(4) min | β− | 225Fr | 7/2− | |||
226Rn | 86 | 140 | 226.03089(43)# | 7.4(1) min | β− | 226Fr | 0+ | |||
227Rn | 86 | 141 | 227.03541(45)# | 20.8(7) s | β− | 227Fr | 5/2(+#) | |||
228Rn | 86 | 142 | 228.03799(44)# | 65(2) s | β− | 228Fr | 0+ | |||
229Rn | 86 | 143 | 229.0426536(141) | 12 s |
备注:画上#号的数据代表没有经过实验的证明,只是理论推测而已,而用括号括起来的代表数据不确定性。
← | 同位素列表 | → |
砈的同位素 | 氡的同位素 | 钫的同位素 |
注释[编辑]
参考文献[编辑]
- ^ Universal Nuclide Chart. nucleonica. [2015-10-25]. (原始内容存档于2017-02-19).
- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) (页面存档备份,存于互联网档案馆). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) (页面存档备份,存于互联网档案馆).
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties (页面存档备份,存于互联网档案馆), Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (页面存档备份,存于互联网档案馆) (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
元素与同位素的稳定度 | |||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|