氖的同位素
氖(原子量:20.1797(6))共有19個已知同位素,質量數介於15-34之間,其中有3個是穩定的,其他都具有放射性。天然存在的氖同位素有3個,分別是20Ne、21Ne、22Ne,皆為穩定同位素。其他放射性同位素都不出現在自然界中,只有在實驗室製造出來過,且半衰期都極短,非常不穩定。
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標準原子質量 (Ar, 標準) |
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圖表
符號 | Z( p ) |
N( n ) |
同位素質量(u) | 半衰期 | 衰變 方式[2] |
衰變 產物[n 1] |
原子核 自旋 |
相對豐度 (莫耳分率) |
相對豐度 變化量 (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 2] | 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 3][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) | 穩定 | 3/2+ | 0.0027(1) | 0.0027–0.0171 | ||
22Ne | 10 | 12 | 21.991385114(19) | 穩定 | 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+ |
備註:畫上#號的數據代表沒有經過實驗的証明,只是理論推測而已,而用括號括起來的代表數據不確定性。
← | 同位素列表 | → |
氟的同位素 | 氖的同位素 | 鈉的同位素 |
參考文獻
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