Geophysical determination of the138La β−decay constant
Geophysical determination of the138La β−decay constant
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DOI：
10.1103/physrevc.62.017601
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发表时间：
2000-06
影响因子：
3.1
通讯作者：
M. Tanimizu
中科院分区：
文献类型：
--
作者：
M. Tanimizu
138 La β− 衰变常数是通过地球物理方法确定的。从古代火成结晶岩中检查了 138 C e/142 Ce 和 143 N d/144 Nd 的同位素生长。 Ce 同位素测量采用了新开发的动态多接收器技术。根据 143 Nd 的生长，计算出岩石的结晶年龄为 2037±13 Myr。根据 138 Ce 的年龄和生长情况，估算 138 La 的 λ β 为（2.37±0. 1 0）× 10− 12 yr− 1。该值与最近两次镧化合物的 γ 射线计数数据在分析误差范围内一致。
The 138 La β− decay constant was determined geophysically. The isotopic growths of 138 C e/142 Ce and 143 N d/144 Nd were examined from ancient igneous crystalline rocks. For the Ce isotope measurement, a newly developed dynamic multicollector technique was applied. The crystallization age of the rocks was calculated to be 2037±13 Myr from the growth of 143 Nd. From the age and the growth of 138 Ce, λ β of 138 La was estimated to be (2.37±0. 1 0)× 10− 12 yr− 1. This value is consistent with those of the latest two γ-ray counting data of lanthanum compounds within the analytical error.