Direct evidence for two-neutrino double-beta decay in 82Se.
Direct evidence for two-neutrino double-beta decay in 82Se.
复制标题
DOI：
10.1103/physrevlett.59.2020
复制
发表时间：
1987-11
影响因子：
8.6
通讯作者：
Elliott;Hahn;Moe
中科院分区：
文献类型：
--
作者：
Elliott;Hahn;Moe
在时间投影室中观察到/sup 82/Se中双β衰变的双中微子模式，半衰期为（1.1/sub -0.3//sup +0.8/） × 10/sup 20/ yr（68%置信水平）。这一直接计数的结果证实了早期的地球化学测量，并有助于提供一个标准来测试核理论的双β衰变矩阵元素。这是在实验室中直接观察到的最罕见的自然衰变过程。
The two-neutrino mode of double-beta decay in /sup 82/Se has been observed in a time-projection chamber at a half-life of (1.1/sub -0.3//sup +0.8/) x 10/sup 20/ yr (68% confidence level). This result from direct counting confirms the earlier geochemical measurements and helps provide a standard by which to test the double-beta-decay matrix elements of nuclear theory. It is the rarest natural decay process ever observed directly in the laboratory.