Half-lives of 132La and 135La
Half-lives of 132La and 135La
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DOI：
10.1103/physrevc.97.034312
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发表时间：
2018-03-12
影响因子：
3.1
通讯作者：
Severin, G. W.
中科院分区：
文献类型：
--
作者：
Abel, E. P.;Clause, H. K.;Severin, G. W.
La-135和La-132的半衰期用连续伽马能谱法测定，La-135的半衰期用高精度电离室法测定。La-135和La-132分别为18.91(2)hr和4.59(4)hr，而之前编制的值分别为19.5(2)hr和4.8(2)hr。这些镧同位素组成了一个医学上有趣的系统，正电子发射器La-132和俄歇电子发射器La-135形成了一个治疗对，用于内部诊断和治疗。精确的半衰期对于正确评估它们在医学上的价值和更有代表性的核数据制表是必要的。
The half-lives of La-135 and La-132 were determined via serial gamma spectroscopy, and the half-life of La-135 was further determined by a high-precision ionization-chambermeasurement. The results are 18.91(2) hr for La-135 and 4.59(4) hr for La-132 compared with the previously compiled values of 19.5(2) hr and 4.8(2) hr, respectively. These lanthanum isotopes comprise a medically interesting system with positron emitter La-132 and Auger-electron emitter La-135 forming a theranostic pair for internal diagnostics and therapeutics. The precise half-lives are necessary for proper evaluation of their value in medicine and for a more representative tabulation of nuclear data.