钔的同位素
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钔有244Md至260Md共17种同位素，全部都有放射性，其中258Md最稳定，半衰期51.59天。
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[4] |
衰变 产物 |
原子核 自旋[n 1] |
|---|---|---|---|---|---|---|---|
| 激发能量[n 1][n 2] | |||||||
| 244Md | 101 | 143 | 0.30+0.19 −0.09 ms [0.36(14) ms] |
α | 240Es | 3+# | |
| 244mMd | 200(150)# keV | ~9 μs | IT | 244Md | 7+# | ||
| 245Md | 101 | 144 | 245.08081(33)# | 0.90(25) ms | SF | (various) | (1/2−)# |
| α （不常见） | 241Es | ||||||
| 245mMd | 200(100)# keV | 400(200) ms [0.35(+23−16) s] |
α | 241Es | (7/2+) | ||
| β+ （不常见） | 245Fm | ||||||
| 246Md | 101 | 145 | 246.08171(28)# | 1.0(4) s | α | 242Es | |
| β+ （不常见） | 246Fm | ||||||
| 247Md | 101 | 146 | 247.08152(22)# | 1.12(22) s | SF | (various) | 1/2−# |
| α （不常见） | 243Es | ||||||
| 247mMd | ~0.2 s | α (99.99%) | 243Es | ||||
| SF (10−4%) | (various) | ||||||
| 248Md | 101 | 147 | 248.08282(26)# | 7(3) s | β+ (80%) | 248Fm | |
| α (20%) | 244Es | ||||||
| β+, SF (.05%) | (various) | ||||||
| 249Md | 101 | 148 | 249.08291(22)# | 24(4) s | α (60%) | 245Es | (7/2−) |
| β+ (40%) | 249Fm | ||||||
| 249mMd | 100(100)# keV | 1.9(9) s | (1/2−) | ||||
| 250Md | 101 | 149 | 250.08442(32)# | 52(6) s | β+ (93%) | 250Fm | |
| α (7%) | 246Es | ||||||
| β+, SF (.02%) | (various) | ||||||
| 251Md | 101 | 150 | 251.084774(20) | 4.0(5) min | β+ (90%) | 251Fm | 7/2−# |
| α (10%) | 247Es | ||||||
| 252Md | 101 | 151 | 252.08643(14)# | 2.3(8) min | β+ (50%) | 252Fm | |
| α (50%) | 248Es | ||||||
| 253Md | 101 | 152 | 253.08714(3)# | 12(8) min [6(+12−3) min] |
β+ | 253Fm | 7/2−# |
| α | 249Es | ||||||
| 254Md | 101 | 153 | 254.08959(11)# | 10(3) min | β+ | 254Fm | (0−) |
| α （不常见） | 250Es | ||||||
| 254mMd | 50(100)# keV | 28(8) min | β+ | 254Fm | (3−) | ||
| α （不常见） | 250Es | ||||||
| 255Md | 101 | 154 | 255.091084(7) | 27(2) min | β+ (92%) | 255Fm | (7/2−) |
| α (8%) | 251Es | ||||||
| SF (.15%) | (various) | ||||||
| 256Md | 101 | 155 | 256.09389(13)# | 77(2) min | β+ (89%) | 256Fm | (1−) |
| α (11%) | 252Es | ||||||
| 257Md | 101 | 156 | 257.0955424(29) | 5.52(5) h | ε (84.8%) | 257Fm | (7/2−) |
| α (15.2%) | 253Es | ||||||
| SF (1%) | (various) | ||||||
| 258Md | 101 | 157 | 258.098431(5) | 51.5(3) d | α (99.99%) | 254Es | (8−)# |
| β− (.0015%) | 258No | ||||||
| β+ (.0015%) | 258Fm | ||||||
| 258mMd | 0(200)# keV | 57.0(9) min | ε (70%) | 258Fm | 1−# | ||
| SF (20%) | (various) | ||||||
| β− (10%) | 258No | ||||||
| α (1.2%) | 254Es | ||||||
| 259Md[n 3] | 101 | 158 | 259.10051(22)# | 1.60(6) h | SF (98.7%) | (various) | 7/2−# |
| α (1.3%) | 255Es | ||||||
| 260Md | 101 | 159 | 260.10365(34)# | 27.8(8) d | SF (85%) | (various) | |
| α (5%) | 256Es | ||||||
| ε (5%) | 260Fm | ||||||
| β− (3.5%) | 260No | ||||||
- ^ 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 259No
| ← | 同位素列表 | → |
| 镄的同位素 | 钔的同位素 | 锘的同位素 |
参考文献
[编辑]- ^ Singh, Balraj. Nuclear Data Sheets for A=256. Nuclear Data Sheets (Elsevier BV). 2017, 141: 327–364. ISSN 0090-3752. doi:10.1016/j.nds.2017.03.002.
- ^ Singh, Balraj. Nuclear Data Sheets for A=258. Nuclear Data Sheets (Elsevier BV). 2017, 144: 297–322. ISSN 0090-3752. doi:10.1016/j.nds.2017.08.003.
- ^ Schmorak, M.R. Nuclear Data Sheets for A = 246–266(even). Nuclear Data Sheets (Elsevier BV). 1989, 57 (4): 515–629. ISSN 0090-3752. doi:10.1016/s0090-3752(89)80092-4.
- ^ 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.