鏷的同位素
鏷的同位素均具有放射性，其中最穩定的為231Pa，質量数在231以下的同位素主要發生α衰變生成錒，而質量数超過231的主要發生β衰變生成鈾。
| ||||||||||||||||||||||||||||||||||||||||||||||||||||
| 標準原子質量 (Ar, 標準) |
| |||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||||||||||||||||||||||||||||||||||||||||
圖表
| 符號 | 歷史 名稱 |
Z（ p ） |
N（ n ） |
同位素質量（u） | 半衰期 | 衰變 方式[2][n 1] |
衰變 產物[n 2] |
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 | ||||||||||
| 212Pa | 91 | 121 | 212.02320(8) | 8(5) ms [5.1(+61−19) ms] |
7+# | |||||
| 213Pa | 91 | 122 | 213.02111(8) | 7(3) ms [5.3(+40−16) ms] |
α | 209Ac | 9/2−# | |||
| 214Pa | 91 | 123 | 214.02092(8) | 17(3) ms | α | 210Ac | ||||
| 215Pa | 91 | 124 | 215.01919(9) | 14(2) ms | α | 211Ac | 9/2−# | |||
| 216Pa | 91 | 125 | 216.01911(8) | 105(12) ms | α (80%) | 212Ac | ||||
| β+ (20%) | 216Th | |||||||||
| 217Pa | 91 | 126 | 217.01832(6) | 3.48(9) ms | α | 213Ac | 9/2−# | |||
| 217mPa | 1860(7) keV | 1.08(3) ms | α | 213Ac | 29/2+# | |||||
| IT （不常見） | 217Pa | |||||||||
| 218Pa | 91 | 127 | 218.020042(26) | 0.113(1) ms | α | 214Ac | ||||
| 219Pa | 91 | 128 | 219.01988(6) | 53(10) ns | α | 215Ac | 9/2− | |||
| β+ (5×10−9%) | 219Th | |||||||||
| 220Pa | 91 | 129 | 220.02188(6) | 780(160) ns | α | 216Ac | 1−# | |||
| 221Pa | 91 | 130 | 221.02188(6) | 4.9(8) µs | α | 217Ac | 9/2− | |||
| 222Pa | 91 | 131 | 222.02374(8)# | 3.2(3) ms | α | 218Ac | ||||
| 223Pa | 91 | 132 | 223.02396(8) | 5.1(6) ms | α | 219Ac | ||||
| β+ (.001%) | 223Th | |||||||||
| 224Pa | 91 | 133 | 224.025626(17) | 844(19) ms | α (99.9%) | 220Ac | 5−# | |||
| β+ (.1%) | 224Th | |||||||||
| 225Pa | 91 | 134 | 225.02613(8) | 1.7(2) s | α | 221Ac | 5/2−# | |||
| 226Pa | 91 | 135 | 226.027948(12) | 1.8(2) min | α (74%) | 222Ac | ||||
| β+ (26%) | 226Th | |||||||||
| 227Pa | 91 | 136 | 227.028805(8) | 38.3(3) min | α (85%) | 223Ac | (5/2−) | |||
| ε (15%) | 227Th | |||||||||
| 228Pa | 91 | 137 | 228.031051(5) | 22(1) h | β+ (98.15%) | 228Th | 3+ | |||
| α (1.85%) | 224Ac | |||||||||
| 229Pa | 91 | 138 | 229.0320968(30) | 1.50(5) d | ε (99.52%) | 229Th | (5/2+) | |||
| α (.48%) | 225Ac | |||||||||
| 229mPa | 11.6(3) keV | 420(30) ns | 3/2− | |||||||
| 230Pa | 91 | 139 | 230.034541(4) | 17.4(5) d | β+ (91.6%) | 230Th | (2−) | |||
| β− (8.4%) | 230U | |||||||||
| α (.00319%) | 226Ac | |||||||||
| 231Pa | Protoactinium | 91 | 140 | 231.0358840(24) | 3.276(11)×104 y | α | 227Ac | 3/2− | 1.0000[n 3] | |
| CD (1.34×10−9%) | 207Tl 24Ne | |||||||||
| SF (3×10−10%) | (various) | |||||||||
| CD (10−12%) | 208Pb 23F | |||||||||
| 232Pa | 91 | 141 | 232.038592(8) | 1.31(2) d | β− | 232U | (2−) | |||
| ε (.003%) | 232Th | |||||||||
| 233Pa | 91 | 142 | 233.0402473(23) | 26.975(13) d | β− | 233U | 3/2− | |||
| 234Pa | Uranium Z | 91 | 143 | 234.043308(5) | 6.70(5) h | β− | 234U | 4+ | Trace[n 4] | |
| SF (3×10−10%) | (various) | |||||||||
| 234mPa | Uranium X2 Brevium |
78(3) keV | 1.17(3) min | β− (99.83%) | 234U | (0−) | Trace[n 4] | |||
| IT (.16%) | 234Pa | |||||||||
| SF (10−10%) | (various) | |||||||||
| 235Pa | 91 | 144 | 235.04544(5) | 24.44(11) min | β− | 235U | (3/2−) | |||
| 236Pa | 91 | 145 | 236.04868(21) | 9.1(1) min | β− | 236U | 1(−) | |||
| β−, SF (6×10−8%) | (various) | |||||||||
| 237Pa | 91 | 146 | 237.05115(11) | 8.7(2) min | β− | 237U | (1/2+) | |||
| 238Pa | 91 | 147 | 238.05450(6) | 2.27(9) min | β− | 238U | (3−)# | |||
| β−, SF (2.6×10−6%) | (various) | |||||||||
| 239Pa | 91 | 148 | 239.05726(21)# | 1.8(5) h | β− | 239U | (3/2)(−#) | |||
| 240Pa | 91 | 149 | 240.06098(32)# | 2# min | β− | 240U | ||||
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 | → |
| 釷的同位素 | 鏷的同位素 | 鈾的同位素 |
註釋
- Abbreviations:
CD: Cluster decay
EC: Electron capture
IT: Isomeric transition
SF: Spontaneous fission - Stable isotopes in bold
- Intermediate decay product of 235U
- Intermediate decay product of 238U
参考文獻
- Meija, Juris; et al. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- . nucleonica. [2015-11-03]. （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）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （页面存档备份，存于）.
- 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）, 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） (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.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.