氡的同位素
| ||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||
氡有34個已知的同位素,均具有放射性,其中最穩定的為222Rn。
圖表[編輯]
符號 | 歷史 名稱 |
Z( p ) |
N( n ) |
同位素質量(u) | 半衰期 | 衰變 方式[1] |
衰變 產物 |
原子核 自旋 |
相對豐度 (莫耳分率) |
相對豐度 (莫耳分率) |
---|---|---|---|---|---|---|---|---|---|---|
激發能量 | ||||||||||
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 1] | ||
219Rn | 錒射氣 | 86 | 133 | 219.0094802(27) | 3.96(1) s | α | 215Po | 5/2+ | 痕量[n 2] | |
220Rn | 釷射氣 | 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 | 鐳射氣 | 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 |
備註:畫上#號的數據代表沒有經過實驗的證明,只是理論推測而已,而用括號括起來的代表數據不確定性。
← | 同位素列表 | → |
砈的同位素 | 氡的同位素 | 鍅的同位素 |
註釋[編輯]
參考文獻[編輯]
- ^ Universal Nuclide Chart. nucleonica. [2015-10-25]. (原始內容存檔於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 (頁面存檔備份,存於網際網路檔案館), Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (頁面存檔備份,存於網際網路檔案館) (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 | |||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|