Investigation of 74As decay branching ratio dependence on the host material

Measurement of the half-life of 198Au in a non-metal: High-precision measurement shows no host-material dependence

We have measured the half-life of the beta decay of 198Au to be 2.6948(9) d, with the nuclide sited in an insulating environment. Comparing this result with the half-life we measured previously with a metallic environment, we find the half-lives in both environments to be the same within 0.04%, thus contradicting a prediction that screening from a "plasma" of quasi-free electrons in a metal increases the half-life by as much as 7%.

Absence of low-temperature dependence of the decay of 7Be and 198Au in metallic hosts

The electron-capture (EC) decay rate of 7Be in metallic Cu host and the beta-decay rate of 198Au in the host alloy Al-Au have been measured simultaneously at several temperatures, ranging from 0.350 K to 293 K. No difference of the half-life of 198Au between 12.5 K and 293 K is observed to a precision of 0.1%. By utilizing the special characteristics of our double-source assembly, possible geometrical effects that influence the individual rates could be eliminated. The ratio of 7Be to 198Au activity thus obtained also remains constant for this temperatures range to the experimental precision o…

扩展量子分子动力学模型中 p+$^{12}$C 反应的分支比与信息熵

Branching ratio and information entropy for the p+$^{12}$C reaction in the extended-quantum-molecular-dynamics model

本文利用 EQMD 模型和 GEMINI 衰变过程模拟了 p+$^{12}$C 反应，发现三角形 3$α$ 结构在分支比和信息熵曲线上具有独特特征，提出事件信息熵可作为探测 $α$ 团簇结构的探针。