Pressure Dependence of the Radioactive Decay Constant of Beryllium-7
Pressure Dependence of the Radioactive Decay Constant of Beryllium-7
复制标题
Beryllium-7 放射性衰变常数的压力依赖性
DOI：
10.1126/science.181.4105.1164
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发表时间：
1973
期刊：
影响因子：
56.9
通讯作者：
J. Huizenga
中科院分区：
文献类型：
--
作者：
W. Hensley;W. Bassett;J. Huizenga
一种新设计的金刚石砧压机被用来将氧化铍-7样品压缩到120、210和270千巴。测定了压缩样品和未压缩样品通过电子捕获将铍-7转化为锂-7的衰变常数。对实验数据进行方程(λc-λ)/λ = KpP的最小二乘拟合，其中λc和λ分别是压缩样品和未压缩样品的衰减常数，P是压力，得到恒定Kp的值为（2.2±0.1）× 10-5 kbar-1。
Diamond anvil presses of a new design were used to compress samples of beryllium-7 oxide to 120, 210, and 270 kilobars. The decay constant for the conversion of beryllium-7 to lithium-7 by electron capture was measured for compressed and uncompressed samples. A least-squares fit of the equation (λc-λ)/λ = KpP to the experimental data, where λC and λ are the decay constants of the compressed sample and an uncompressed sample, respectively, and P is pressure, yields a value of (2.2 � 0.1) x 10-5 kbar-1 for the constant Kp.