氡的同位素
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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 | N | 同位素质量（u） [n 1][n 2] |
半衰期 [n 2] |
衰变 方式[1] |
衰变 产物 |
原子核 自旋[n 1] |
相对丰度 （莫耳分率） |
|---|---|---|---|---|---|---|---|---|---|
| 激发能量[n 1][n 2] | |||||||||
| 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 3] | |
| 219Rn | 锕射气 | 86 | 133 | 219.0094802(27) | 3.96(1) s | α | 215Po | 5/2+ | 痕量[n 4] |
| 220Rn | 钍射气 | 86 | 134 | 220.0113940(24) | 55.6(1) s | α | 216Po | 0+ | 痕量[n 5] |
| 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 3] |
| 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 | |||||
- ^ 1.0 1.1 1.2 画上#号的数据代表没有经过实验的证明，仅为理论推测。
- ^ 2.0 2.1 2.2 用括号括起来的数据代表不确定性。
- ^ 3.0 3.1 238U的衰变产物
- ^ 235U的衰变产物
- ^ 232Th的衰变产物
| ← | 同位素列表 | → |
| 砈的同位素 | 氡的同位素 | 钫的同位素 |
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).
- 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.