氩的同位素
氩（原子量：39.948(1)）共有25个同位素，其中有3个是稳定的。
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| 标准原子质量 (Ar, 标准) |
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图表
| 符号 | Z | N | 同位素质量（u） [n 1][n 2] |
半衰期 [n 1][n 2] |
衰变 方式[2] |
衰变 产物 [n 3] |
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） |
|---|---|---|---|---|---|---|---|---|---|
| 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 | ||||||||
| 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 4] | 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 5] | 18 | 21 | 38.964313(5) | 269(3) y | β− | 39K | 7/2− | 痕量[n 6] | |
| 40 Ar [n 7] |
18 | 22 | 39.9623831225(29) | 稳定 | 0+ | 0.996035(4)[n 8] | |||
| 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 | ||||||||
- ^ 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。
- ^ 稳定的衰变产物以粗体表示。
- ^ 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.
| ← | 同位素列表 | → |
| 氯的同位素 | 氩的同位素 | 钾的同位素 |
参考文献
- ^ 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.