锫的同位素
锫有20种同位素和6种同核异构体，全部都有放射性，其中最稳定的是半衰期1380年的247Bk。
| ||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||
圖表
| 符號 | Z（ p ） |
N（ n ） |
同位素質量（u） | 半衰期 | 衰變 方式[2] |
衰變 產物 |
原子核 自旋 |
|---|---|---|---|---|---|---|---|
| 激發能量 | |||||||
| 236Bk[3] | 97 | 139 | 236.05733(43)# | 22+13 −6 s |
β+（96%） | 236Cm | 4+# |
| β+, SF（4%） | (various) | ||||||
| 238Bk | 97 | 141 | 238.05828(31)# | 2.40(8) min | α | 234Am | |
| β+, SF (.048%) | (various) | ||||||
| β+ （不常見） | 238Cm | ||||||
| 239Bk | 97 | 142 | 239.05828(25)# | 3# min | α | 235Am | 7/2+# |
| β+ | 239Cm | ||||||
| 240Bk | 97 | 143 | 240.05976(16)# | 4.8(8) min | β+ (90%) | 240Cm | |
| α (10%) | 236Am | ||||||
| β+, SF (.002%) | (various) | ||||||
| 241Bk | 97 | 144 | 241.06023(22)# | 4.6(4) min | α | 237Am | (7/2+) |
| β+ （不常見） | 241Cm | ||||||
| 242Bk | 97 | 145 | 242.06198(22)# | 7.0(13) min | β+ (99.99%) | 242Cm | 2−# |
| β+, SF (3×10−4%) | (various) | ||||||
| 242mBk | 200(200)# keV | 600(100) ns | |||||
| 243Bk | 97 | 146 | 243.063008(5) | 4.5(2) h | β+ (99.85%) | 243Cm | (3/2−) |
| α (.15%) | 239Am | ||||||
| 244Bk | 97 | 147 | 244.065181(16) | 4.35(15) h | β+ (99.99%) | 244Cm | (4−)# |
| α (.006%) | 240Am | ||||||
| 245Bk | 97 | 148 | 245.0663616(25) | 4.94(3) d | ε (99.88%) | 245Cm | 3/2− |
| α (.12%) | 241Am | ||||||
| 246Bk | 97 | 149 | 246.06867(6) | 1.80(2) d | β+ (99.8%) | 246Cm | 2(−) |
| α (.2%) | 242Am | ||||||
| 247Bk | 97 | 150 | 247.070307(6) | 1.38(25)×103 y | α | 243Am | (3/2−) |
| SF （不常見） | (various) | ||||||
| 248Bk | 97 | 151 | 248.07309(8)# | >300 y[1] | α | 244Am | 6+# |
| 248mBk | 30(70)# keV | 23.7(2) h | 1(−) | ||||
| 249Bk[n 1] | 97 | 152 | 249.0749867(28) | 330(4) d | β− | 249Cf | 7/2+ |
| α (.00145%) | 245Am | ||||||
| SF (4.7×10−8%) | (various) | ||||||
| 249mBk | 8.80(10) keV | 300 µs | (3/2−) | ||||
| 250Bk | 97 | 153 | 250.078317(4) | 3.212(5) h | β− | 250Cf | 2− |
| 250m1Bk | 35.59(5) keV | 29(1) µs | (4+) | ||||
| 250m2Bk | 84.1(21) keV | 213(8) µs | (7+) | ||||
| 251Bk | 97 | 154 | 251.080760(12) | 55.6(11) min | β− | 251Cf | (3/2−)# |
| α (10−5%) | 247Am | ||||||
| 251mBk | 35.5(13) keV | 58(4) µs | (7/2+)# | ||||
| 252Bk | 97 | 155 | 252.08431(22)# | 1.8(5) min | β− | 252Cf | |
| α | 248Am | ||||||
| 253Bk | 97 | 156 | 253.08688(39)# | 10# min | β− | 253Cf | |
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 | → |
| 鋦的同位素 | 锫的同位素 | 锎的同位素 |
註釋
- 最容易制备的同位素
参考文獻
- Milsted, J.; Friedman, A. M.; Stevens, C. M. . Nuclear Physics. 1965, 71 (2): 299. doi:10.1016/0029-5582(65)90719-4.
-
. nucleonica. [2015-11-03]. （原始内容存档于2017-02-19）. - Konki, J.; et al. . Physics Letters B. 10 Jan 2017, 764: 265–270. Bibcode:2017PhLB..764..265K. ISSN 0370-2693. doi:10.1016/j.physletb.2016.11.038
.
- 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.
- 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.