氩的同位素
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标准原子质量 (Ar, 标准) |
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氩(原子量:39.948(1))共有25个同位素,其中有3个是稳定的。
图表[编辑]
符号 | Z( p ) |
N( n ) |
同位素质量(u) | 半衰期 | 衰变 方式[2] |
衰变 产物[n 1] |
原子核 自旋 |
相对丰度 (莫耳分率) |
相对丰度的变化量 (莫耳分率) |
---|---|---|---|---|---|---|---|---|---|
激发能量 | |||||||||
30Ar | 18 | 12 | 30.02156(32)# | <20 ns | p | 29Cl | 0+ | ||
31Ar | 18 | 13 | 31.01212(22)# | 14.4(6) ms | β+, p (55.0%) | 30S | 5/2(+#) | ||
β+ (40.4%) | 31Cl | ||||||||
β+, 2p (2.48%) | 29P | ||||||||
β+, 3p (2.1%) | 28Si | ||||||||
32Ar | 18 | 14 | 31.9976380(19) | 98(2) ms | β+ (56.99%) | 32Cl | 0+ | ||
β+, p (43.01%) | 31S | ||||||||
32mAr | 5600(100) keV | 未知 | 5−# | ||||||
33Ar | 18 | 15 | 32.9899257(5) | 173.0(20) ms | β+ (61.35%) | 33Cl | 1/2+ | ||
β+, p (38.65%) | 32S | ||||||||
34Ar | 18 | 16 | 33.9802712(4) | 844.5(34) ms | β+ | 34Cl | 0+ | ||
35Ar | 18 | 17 | 34.9752576(8) | 1.775(4) s | β+ | 35Cl | 3/2+ | ||
36Ar | 18 | 18 | 35.967545106(29) | 观测上稳定[n 2] | 0+ | 0.003336(4) | |||
37Ar | 18 | 19 | 36.96677632(22) | 35.04(4) d | ε | 37Cl | 3/2+ | ||
38Ar | 18 | 20 | 37.9627324(4) | 稳定 | 0+ | 6.29(1)×10−4 | |||
39Ar[n 3] | 18 | 21 | 38.964313(5) | 269(3) y | β− | 39K | 7/2− | 痕量[n 4] | |
40 Ar [n 5] |
18 | 22 | 39.9623831225(29) | 稳定 | 0+ | 0.996035(4)[n 6] | |||
41Ar | 18 | 23 | 40.9645006(4) | 109.61(4) min | β− | 41K | 7/2− | 痕量 | |
42Ar | 18 | 24 | 41.963046(6) | 32.9(11) y | β− | 42K | 0+ | ||
43Ar | 18 | 25 | 42.965636(6) | 5.37(6) min | β− | 43K | (5/2−) | ||
44Ar | 18 | 26 | 43.9649240(17) | 11.87(5) min | β− | 44K | 0+ | ||
45Ar | 18 | 27 | 44.9680400(6) | 21.48(15) s | β− | 45K | (1/2,3/2,5/2)− | ||
46Ar | 18 | 28 | 45.96809(4) | 8.4(6) s | β− | 46K | 0+ | ||
47Ar | 18 | 29 | 46.97219(11) | 1.23(3) s | β− (99%) | 47K | 3/2−# | ||
β−, n (1%) | 46K | ||||||||
48Ar | 18 | 30 | 47.97454(32)# | 0.48(40) s | β− | 48K | 0+ | ||
49Ar | 18 | 31 | 48.98052(54)# | 170(50) ms | β− | 49K | 3/2−# | ||
50Ar | 18 | 32 | 49.98443(75)# | 85(30) ms | β− | 50K | 0+ | ||
51Ar | 18 | 33 | 50.99163(75)# | 60# ms [>200 ns] | β− | 51K | 3/2−# | ||
52Ar | 18 | 34 | 51.99678(97)# | 10# ms | β− | 52K | 0+ | ||
53Ar | 18 | 35 | 53.00494(107)# | 3# ms | β− | 53K | (5/2−)# | ||
β−, n | 52K |
备注:画上#号的数据代表没有经过实验的证明,只是理论推测而已,而用括号括起来的代表数据不确定性。
← | 同位素列表 | → |
氯的同位素 | 氩的同位素 | 钾的同位素 |
注释[编辑]
- ^ Bold for stable isotopes
- ^ Believed to undergo double electron capture to 36S (lightest theoretically unstable nuclide for which no evidence of radioactivity has been observed)
- ^ Used in argon-argon dating
- ^ Cosmogenic nuclide
- ^ 用于氩-氩年代测定法和钾-氩年代测定法中
- ^ Generated from 40K in rocks. These ratios are terrestrial. Cosmic abundance is far less than 36Ar.
参考文献[编辑]
- ^ 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.
- ^ Universal Nuclide Chart. Nucleonica. [2012-08-15]. (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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