维基百科
鉀的同位素
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) |
---|---|---|---|---|---|---|---|---|
激發能量 | ||||||||
32K | 19 | 13 | 32.02192(54)# | 無數據 | p | 31Ar | 1+# | |
32mK | 950(100)# keV | 無數據 | 4+# | |||||
33K | 19 | 14 | 33.00726(21)# | <25 ns | p | 32Ar | (3/2+)# | |
34K | 19 | 15 | 33.99841(32)# | <25 ns | p | 33Ar | 1+# | |
35K | 19 | 16 | 34.988010(21) | 178(8) ms | β+ (99.63%) | 35Ar | 3/2+ | |
β+, p (.37%) | 34Cl | |||||||
36K | 19 | 17 | 35.981292(8) | 342(2) ms | β+ (99.94%) | 36Ar | 2+ | |
β+, p (.048%) | 35Cl | |||||||
β+, α (.012%) | 32S | |||||||
37K | 19 | 18 | 36.97337589(10) | 1.226(7) s | β+ | 37Ar | 3/2+ | |
38K | 19 | 19 | 37.9690812(5) | 7.636(18) min | β+ | 38Ar | 3+ | |
38m1K | 130.50(28) keV | 924.2(3) ms | 0+ | |||||
38m2K | 3458.0(2) keV | 21.98(11) µs | (7+),(5+) | |||||
39 K | 19 | 20 | 38.96370668(20) | 稳定 | 3/2+ | 0.932581(44) | ||
40 K [n 2][n 3] | 19 | 21 | 39.96399848(21) | 1.248(3)×109 y | β− (89.28%) | 40Ca | 4 | 1.17(1)×10−4 |
EC (10.72%) | 40Ar | |||||||
β+ (0.001%)[3] | ||||||||
40mK | 1643.639(11) keV | 336(12) ns | 0+ | |||||
41K | 19 | 22 | 40.96182576(21) | 穩定 | 3/2+ | 0.067302(44) | ||
42K | 19 | 23 | 41.96240281(24) | 12.360(12) h | β− | 42Ca | 2 | |
43K | 19 | 24 | 42.960716(10) | 22.3(1) h | β− | 43Ca | 3/2+ | |
44K | 19 | 25 | 43.96156(4) | 22.13(19) min | β− | 44Ca | 2− | |
45K | 19 | 26 | 44.960699(11) | 17.3(6) min | β− | 45Ca | 3/2+ | |
46K | 19 | 27 | 45.961977(17) | 105(10) s | β− | 46Ca | 2(−) | |
47K | 19 | 28 | 46.961678(9) | 17.50(24) s | β− | 47Ca | 1/2+ | |
48K | 19 | 29 | 47.965514(26) | 6.8(2) s | β− (98.86%) | 48Ca | (2−) | |
β−, n (1.14%) | 47Ca | |||||||
49K | 19 | 30 | 48.96745(8) | 1.26(5) s | β−, n (86%) | 48Ca | (3/2+) | |
β− (14%) | 49Ca | |||||||
50K | 19 | 31 | 49.97278(30) | 472(4) ms | β− (71%) | 50Ca | (0−,1,2−) | |
β−, n (29%) | 49Ca | |||||||
51K | 19 | 32 | 50.97638(54)# | 365(5) ms | β− (53%) | 51Ca | 3/2+# | |
β−, n (47%) | 50Ca | |||||||
52K | 19 | 33 | 51.98261(75)# | 105(5) ms | β−, n (64%) | 51Ca | (2−)# | |
β−, 2n (21%) | 50Ca | |||||||
β− (15%) | 52Ca | |||||||
53K | 19 | 34 | 52.98712(75)# | 30(5) ms | β−, n (67%) | 52Ca | (3/2+)# | |
β−, 2n (17%) | 51Ca | |||||||
β− (16%) | 53Ca | |||||||
54K | 19 | 35 | 53.99420(97)# | 10(5) ms | β− (>99.9%) | 54Ca | 2−# | |
β−, n (<.1%) | 53Ca | |||||||
55K | 19 | 36 | 54.99971(107)# | 3# ms | β− | 55Ca | 3/2+# | |
β−, n | 54Ca |
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。
註釋
参考文獻
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- 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).
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