锘的同位素
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锘是人造元素，没有稳定同位素，也无法确认标准原子质量。它有从248No至260No及262No这14种同位素，以及众多同核异构体。其中，259No最稳定，半衰期58分钟。
图表
[编辑]| 符号 | 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] |
|---|---|---|---|---|---|---|---|
| 激发能量[n 1][n 2] | |||||||
| 248No | 102 | 146 | 248.08655(24)# | <2 µs | 0+ | ||
| 249No | 102 | 147 | 249.0878(3)# | 57(12) s [54(+15−10) s] |
5/2+# | ||
| 250No | 102 | 148 | 250.08756(22)# | 5.7(8) s | SF (99.95%) | (various) | 0+ |
| α (.05%) | 246Fm | ||||||
| β+ (2.5×10−4%) | 250Md | ||||||
| 251No | 102 | 149 | 251.08894(12)# | 0.78(2) s | α (89%) | 247Fm | 7/2+# |
| SF (10%) | (various) | ||||||
| β+ (1%) | 251Md | ||||||
| 251mNo | 110(180)# keV | 1.7(10) s | 9/2−# | ||||
| 252No | 102 | 150 | 252.088967(10) | 2.27(14) s | α (73.09%) | 248Fm | 0+ |
| SF (26.9%) | (various) | ||||||
| β+ (1%) | 252Md | ||||||
| 253No[n 3] | 102 | 151 | 253.090564(7) | 1.62(15) min | α (80%) | 249Fm | (9/2−)# |
| β+ (20%) | 253Md | ||||||
| SF (10−3%) | (various) | ||||||
| 253mNo | 129(19) keV | 31 s | 5/2+# | ||||
| 254No | 102 | 152 | 254.090956(11) | 51(10) s | α (89.3%) | 250Fm | 0+ |
| β+ (10%) | 254Md | ||||||
| SF (.31%) | (various) | ||||||
| 254mNo | 500(100)# keV | 0.28(4) s | IT (80%) | 254No | 0+ | ||
| α (20%) | 250Fm | ||||||
| 255No | 102 | 153 | 255.093191(16) | 3.1(2) min | α (61.4%) | 251Fm | (1/2+) |
| β+ (38.6%) | 255Md | ||||||
| 256No | 102 | 154 | 256.094283(8) | 2.91(5) s | α (99.44%) | 252Fm | 0+ |
| SF (.55%) | (various) | ||||||
| ε (.01%) | 256Md | ||||||
| 257No | 102 | 155 | 257.096888(7) | 25(2) s | α (99%) | 253Fm | (7/2+) |
| β+ (1%) | 257Md | ||||||
| 258No | 102 | 156 | 258.09821(11)# | 1.2(2) ms | SF (99.99%) | (various) | 0+ |
| α (.01%) | 254Fm | ||||||
| β+β+ （不常见） | 258Fm | ||||||
| 259No | 102 | 157 | 259.10103(11)# | 58(5) min | α (75%) | 255Fm | (9/2+)# |
| ε (25%) | 259Md | ||||||
| SF (10%) | (various) | ||||||
| 260No | 102 | 158 | 260.10264(22)# | 106(8) ms | SF | (various) | 0+ |
| 262No[n 4] | 102 | 160 | 262.10746(39)# | ~5 ms | SF | (various) | 0+ |
- ^ 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。
- ^ Not directly synthesized, occurs as decay product of 257Rf
- ^ Not directly synthesized, occurs as decay product of 262Lr
| ← | 同位素列表 | → |
| 钔的同位素 | 锘的同位素 | 铹的同位素 |
参考文献
[编辑]- ^ Universal Nuclide Chart
. 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).
- 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.