硒的同位素
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标准原子质量 (Ar, 标准) |
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硒(原子量:78.96(3))共有39个同位素,其中有5个同位素是稳定的。
图表
符号 | Z | N | 同位素质量(u) [n 1][n 2] |
半衰期 [n 1][n 2][n 3] |
衰变 方式[3] |
衰变 产物 [n 4] |
原子核 自旋[n 1] |
相对丰度 (莫耳分率)[n 2] |
相对丰度 的变化量 (莫耳分率) |
---|---|---|---|---|---|---|---|---|---|
激发能量[n 2] | |||||||||
65Se | 34 | 31 | 64.96466(64)# | <50 ms | β+ (>99.9%) | 65As | 3/2-# | ||
β+, p (<.1%) | 64Ge | ||||||||
66Se | 34 | 32 | 65.95521(32)# | 33(12) ms | β+ | 66As | 0+ | ||
67Se | 34 | 33 | 66.95009(21)# | 133(11) ms | β+ (99.5%) | 67As | 5/2-# | ||
β+, p (.5%) | 66Ge | ||||||||
68Se | 34 | 34 | 67.94180(4) | 35.5(7) s | β+ | 68As | 0+ | ||
69Se | 34 | 35 | 68.93956(4) | 27.4(2) s | β+ (99.955%) | 69As | (1/2-) | ||
β+, p (.045%) | 68Ge | ||||||||
69m1Se | 39.4(1) keV | 2.0(2) µs | 5/2- | ||||||
69m2Se | 573.9(10) keV | 955(16) ns | 9/2+ | ||||||
70Se | 34 | 36 | 69.93339(7) | 41.1(3) min | β+ | 70As | 0+ | ||
71Se | 34 | 37 | 70.93224(3) | 4.74(5) min | β+ | 71As | 5/2- | ||
71m1Se | 48.79(5) keV | 5.6(7) µs | 1/2- to 9/2- | ||||||
71m2Se | 260.48(10) keV | 19.0(5) µs | (9/2)+ | ||||||
72Se | 34 | 38 | 71.927112(13) | 8.40(8) d | ε | 72As | 0+ | ||
73Se | 34 | 39 | 72.926765(11) | 7.15(8) h | β+ | 73As | 9/2+ | ||
73mSe | 25.71(4) keV | 39.8(13) min | IT | 73Se | 3/2- | ||||
β+ | 73As | ||||||||
74Se | 34 | 40 | 73.9224764(18) | 观测上稳定 [n 5] | 0+ | 0.0089(4) | |||
75Se | 34 | 41 | 74.9225234(18) | 119.779(4) d | ε | 75As | 5/2+ | ||
76Se | 34 | 42 | 75.9192136(18) | 稳定 | 0+ | 0.0937(29) | |||
77Se | 34 | 43 | 76.9199140(18) | 稳定 | 1/2- | 0.0763(16) | |||
77mSe | 161.9223(7) keV | 17.36(5) s | IT | 77Se | 7/2+ | ||||
78Se | 34 | 44 | 77.9173091(18) | 稳定 | 0+ | 0.2377(28) | |||
79 Se [n 6] |
34 | 45 | 78.9184991(18) | 3.27(8)×105 y | β− | 79Br | 7/2+ | ||
79mSe | 95.77(3) keV | 3.92(1) min | IT (99.944%) | 79Se | 1/2- | ||||
β− (.056%) | 79Br | ||||||||
80 Se |
34 | 46 | 79.9165213(21) | 观测上稳定[n 7] | 0+ | 0.4961(41) | |||
81Se | 34 | 47 | 80.9179925(22) | 18.45(12) min | β− | 81Br | 1/2- | ||
81mSe | 102.99(6) keV | 57.28(2) min | IT (99.948%) | 81Se | 7/2+ | ||||
β− (.052%) | 81Br | ||||||||
82Se[n 8] | 34 | 48 | 81.9166994(22) | 0.97(5)×1020 y | β−β− | 82Kr | 0+ | 0.0873(22) | |
83Se | 34 | 49 | 82.919118(4) | 22.3(3) min | β− | 83Br | 9/2+ | ||
83mSe | 228.50(20) keV | 70.1(4) s | β− | 83Br | 1/2- | ||||
84Se | 34 | 50 | 83.918462(16) | 3.1(1) min | β− | 84Br | 0+ | ||
85Se | 34 | 51 | 84.92225(3) | 31.7(9) s | β− | 85Br | (5/2+)# | ||
86Se | 34 | 52 | 85.924272(17) | 15.3(9) s | β− | 86Br | 0+ | ||
87Se | 34 | 53 | 86.92852(4) | 5.50(12) s | β− (99.64%) | 87Br | (5/2+)# | ||
β−, n (.36%) | 86Br | ||||||||
88Se | 34 | 54 | 87.93142(5) | 1.53(6) s | β− (99.01%) | 88Br | 0+ | ||
β−, n (.99%) | 88Br | ||||||||
89Se | 34 | 55 | 88.93645(32)# | 0.41(4) s | β− (92.2%) | 89Br | (5/2+)# | ||
β−, n (7.8%) | 88Br | ||||||||
90Se | 34 | 56 | 89.93996(43)# | 300# ms [>300 ns] | β−, n | 89Br | 0+ | ||
β− | 90Br | ||||||||
91Se | 34 | 57 | 90.94596(54)# | 270(50) ms | β− (79%) | 91Br | 1/2+# | ||
β−, n | 90Br | ||||||||
92Se | 34 | 58 | 91.94992(64)# | 100# ms [>300 ns] | β− | 92Br | 0+ | ||
93Se | 34 | 59 | 92.95629(86)# | 50# ms [>300 ns] | 1/2+# | ||||
94Se | 34 | 60 | 93.96049(86)# | 20# ms [>300 ns] | 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 2.3 用括号括起来的数据代表不确定性。
- ^ 半衰期超过5亿年的同位素以粗体表示。
- ^ 稳定的衰变产物以粗体表示。
- ^ Believed to decay by β+β+ to 74Ge
- ^ Long-lived fission product
- ^ Believed to decay by β−β− to 80Kr
- ^ Primordial radionuclide
← | 同位素列表 | → |
砷的同位素 | 硒的同位素 | 溴的同位素 |
参考文献
- ^ Azzolini, O.; Beeman, J. W.; Bellini, F.; Beretta, M.; Biassoni, M.; Brofferio, C.; Bucci, C.; Capelli, S.; et al. Measurement of the 2νββ Decay Half-Life of 82Se with the Global CUPID-0 Background Model. Physical Review Letters. 2023-11-29, 131 (22). ISSN 0031-9007. doi:10.1103/PhysRevLett.131.222501.
- ^ Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ^ 存档副本. [2015-09-13]. (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,存于互联网档案馆). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) (页面存档备份,存于互联网档案馆).
- 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.
元素与同位素的稳定度 | |||||||||||||||||||||||||||||||||
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