氖的同位素
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标准原子质量 (Ar, 标准) |
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氖(原子量:20.1797(6))共有19个已知同位素,质量数介于15-34之间,其中有3个是稳定的,其他都具有放射性。天然存在的氖同位素有3个,分别是20Ne、21Ne、22Ne,皆为稳定同位素。其他放射性同位素都不出现在自然界中,只有在实验室制造出来过,且半衰期都极短,非常不稳定。
![](http://images.weserv.nl/?url=//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Neon_chart.png/220px-Neon_chart.png)
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) |
---|---|---|---|---|---|---|---|---|---|
15Ne[3] | 10 | 5 | 15.04317(7) | 7.7(3)×10−22 s [0.59(23)− 2.522(60) MeV] |
2p | 13O | (3/2−) | ||
16Ne | 10 | 6 | 16.025761(22) | 9×10−21 s [122(37) keV] |
2p | 14O | 0+ | ||
17Ne[n 4] | 10 | 7 | 17.017672(29) | 109.2(6) ms | β+, p (96.0%) | 16O | 1/2– | ||
β+, α (2.7%) | 13N | ||||||||
β+ (1.3%) | 17F | ||||||||
18Ne | 10 | 8 | 18.0057082(3) | 1.672(8) s | β+ | 18F | 0+ | ||
2p | 16O | ||||||||
2He[n 5][4] | 16O, 2He | ||||||||
19Ne | 10 | 9 | 19.0018802(3) | 17.296(5) s+ | β+ | 19F | 1/2+ | ||
20 Ne |
10 | 10 | 19.9924401754(19) | 稳定 | 0+ | 0.9048(3) | 0.8847–0.9051 | ||
21Ne | 10 | 11 | 20.99384668(4) | 稳定 | 3/2+ | 0.0027(1) | 0.0027–0.0171 | ||
22Ne | 10 | 12 | 21.991385114(19) | 稳定 | 0+ | 0.0925(3) | 0.0920–0.0996 | ||
23Ne | 10 | 13 | 22.99446690(11) | 37.24(12) s | β− | 23Na | 5/2+ | ||
24Ne | 10 | 14 | 23.9936108(4) | 3.38(2) min | β− | 24Na | 0+ | ||
25Ne | 10 | 15 | 24.997737(28) | 602(8) ms | β− | 25Na | (3/2)+ | ||
26Ne | 10 | 16 | 26.000461(29) | 197(1) ms | β− (99.87%) | 26Na | 0+ | ||
β−, n (.13%) | 25Na | ||||||||
27Ne | 10 | 17 | 27.00759(12) | 32(2) ms | β− (98.0%) | 27Na | (3/2+)# | ||
β−, n (2.0%) | 26Na | ||||||||
28Ne | 10 | 18 | 28.01207(16) | 18.3(22) ms | β− (78.0%) | 28Na | 0+ | ||
β−, n (22.0%) | 27Na | ||||||||
29Ne | 10 | 19 | 29.01939(29) | 15.6(5) ms | β− | 29Na | (3/2+)# | ||
30Ne | 10 | 20 | 30.02480(61) | 5.8(2) ms | β− | 30Na | 0+ | ||
31Ne | 10 | 21 | 31.03311(97)# | 3.4(8) ms | β− | 31Na | 7/2−# | ||
β−, n | 30Na | ||||||||
32Ne | 10 | 22 | 32.04002(86)# | 3.5(9) ms | β−, n | 31Na | 0+ | ||
β− | 32Na | ||||||||
33Ne | 10 | 23 | 33.04938(86)# | <260 ns | 7/2−# | ||||
34Ne | 10 | 24 | 34.05703(87)# | 1# ms [>1.5 µs] | 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。
- ^ 稳定的衰变产物以粗体表示。
- ^ Has 2 halo protons
- ^ 氦2发射
← | 同位素列表 | → |
氟的同位素 | 氖的同位素 | 钠的同位素 |
参考文献
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