The $\beta$-delayed two-proton ($\beta 2p$) decay of ${}^{27}\mathrm{S}$ was studied using a state-of-the-art silicon array and Clover-type HPGe detectors. An energy peak at 6372(15) keV with a branching ratio of 2.4(5)% in the decay-energy spectrum was identified as a two-proton transition via the isobaric-analog state in ${}^{27}\mathrm{P}$ to the ground state of ${}^{25}\mathrm{Al}$ in the $\beta$ decay of ${}^{27}\mathrm{S}$. Two-proton angular correlations were measured by the silicon array to study the mechanism of two-proton emission. Based on experimental results and Monte Carlo simulations, it was found that the main mechanism for the emission of $\beta 2p$ by ${}^{27}\mathrm{S}$ is of sequential nature.

中文翻译：

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S27在质子滴落线上的β-延迟二质子衰变

这 $\beta$-延迟两质子（$\beta 2磷$) 的衰变 ${}^{27}\mathrm{秒}$使用最先进的硅阵列和 Clover 型 HPGe 探测器进行了研究。衰变能谱中 6372(15) keV 的能量峰具有 2.4(5)% 的分支比，被确定为通过等压模拟状态的双质子跃迁${}^{27}\mathrm{磷}$ 到基态 ${}^{25}铝$ 在里面 $\beta$ 衰败 ${}^{27}\mathrm{秒}$. 通过硅阵列测量两质子角相关性以研究两质子发射机制。基于实验结果和蒙特卡罗模拟，发现发射的主要机制$\beta 2磷$ 经过 ${}^{27}\mathrm{秒}$ 具有连续性。