钾-40













































钾-40
全部


一般

名稱／符號
 钾-40,40K

中子數量
 21

質子數量
 19

核素數據

豐度
 0.0117(1)%

半衰期
1.248(3)×109 y

原子量
 39.96399848(21) u

自旋
 4−

过剩能量
−33,505 keV

结合能
341,523 keV

钾-40（40K）是钾元素的一种放射性同位素，原子核不稳定，可以自发衰变成氩-40，半衰期1.248×109年。该反应是地质学上鉀－氬年代測定法的依据，具有广泛的用途。地球上的氩气也有很多来自它的衰变。



外部链接



  • Potassium 40 Human Health Fact Sheet in Argonne National Laboratory Environmental Science Division, Radiological and Chemical Fact Sheets to Support Health Risk Analyses for Contaminated Areas














相邻较轻同位素:
鉀-39
 钾-40是
鉀的同位素
 相邻较重同位素:
鉀-41

母同位素：
—
 钾-40的
衰變鏈
衰變產物為
氬-40, 鈣-40, 稳定




Chem template.svg  钾-40是一个化学元素小作品。你可以通过编辑或修订扩充其内容。







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