氡的同位素
外观
(重定向自氡-220)
| ||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||
氡有34个已知的同位素,均具有放射性,其中最稳定的为222Rn。
圖表
[编辑]符號 | 歷史 名稱 |
Z | N | 同位素質量(u) [n 1][n 2] |
半衰期 [n 2] |
衰變 方式[1] |
衰變 產物 |
原子核 自旋[n 1] |
相對豐度 (莫耳分率) |
---|---|---|---|---|---|---|---|---|---|
激發能量[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+ (不常見) | 196At | ||||||||
197Rn | 86 | 111 | 197.00158(7) | 66(16) ms [65(+23−14) ms] |
α | 193Po | 3/2−# | ||
β+ (不常見) | 197At | ||||||||
197mRn | 200(60)# keV | 21(5) ms [19(+8−4) ms] |
α | 193Po | (13/2+) | ||||
β+ (不常見) | 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 畫上#號的數據代表沒有經過實驗的証明,僅為理論推測。
- ^ 2.0 2.1 2.2 用括號括起來的數據代表不確定性。
- ^ 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 | 鍅的同位素 |
参考文獻
[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.
元素與同位素的穩定度 | |||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|