β -delayed two-proton decay of S 27 at the proton-drip line

作者：G. Z. Shi, J. J. Liu, Z. Lin, Huiping Zhu, Xiangxiang Xu, L. J. Sun, Pengfei Liang, C. J. Lin, J. Lee, Cenxi Yuan, S. M. Wang, Zhenheng Li, X. Xu, Zhengguo Hu, Y. Y. Yang, R. F. Chen, J. S. Wang, D. X. Wang, H. y. Wu, K. Wang, F. F. Duan, Y. H. Lam, P. Ma, Zhihao Gao, Q. Hu, Z. Bai, J. B., J. G. Wang, F. P. Zhong, C. Wu, D. W. Luo, Y. Jiang, Y. Liu, D. S. Hou, R. Li, N. R., W. H., Gongming Yu, D. Patel, Shichao Jin, Yibai Wang, Y. C. Yu, Q. W. Zhou, Pingfei Wang, Liyuan Hu, X. Wang, H. L. Zang, P. J. Li, Q. Gao, Hao Jian, Shunyuan Zha, F. C. Dai, Ruirui Fan, Qiong Zhao, L. Yang, Peiwei Wen, F. Yang, H. M. Jia, G. L. Zhang, Min Pan, X. Y. Wang, Huahuai Sun, Xin‐Hui Zhou, Y. H. Zhang, M. Wang, M. L. Liu, H. J. Ong, W. Q. Yang · 发表于：Physical Review C · 年份：2021 · DOI：10.1103/physrevc.103.l061301 · 被引用次数：9 · 研究领域：Nuclear physics research studies、Radiation Detection and Scintillator Technologies、Neutrino Physics Research

The $\ensuremath{\beta}$-delayed two-proton ($\ensuremath{\beta}2p$) 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 $\ensuremath{\beta}$ 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 $\ensuremath{\beta}2p$ by $^{27}\mathrm{S}$ is of sequential nature.