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β-Delayed γ Emissions of 26P and Its Mirror Asymmetry

Hao Jian,Yufeng Gao,Fanchao Dai,Jiajian Liu,Xinxing Xu,Cenxi Yuan,Kazunari Kaneko,Yang Sun,Pengfei Liang,Guozhu Shi,Lijie Sun,Latsamy Xayavong,Chengjian Lin,Jenny Lee,Zhihuan Li,Yanyun Yang,Pengjie Li,Rui Fan,Sixian Zha,Haofan Zhu,Jinhai Li,Qirui Gao,Zhaozhan Zhang,Ruofu Chen,Jiansong Wang,Dongxi Wang,Hongyi Wu,Kang Wang,Yihua Lam,Fangfang Duan,Peng Ma,Zhihao Gao,Qiang Hu,Zhen Bai,Junbing Ma,Jianguo Wang,Fupeng Zhong,Chenguang Wu,Diwen Luo,Ying Jiang,Yang Liu,Dongsheng Hou,Ren Li,Nanru Ma,Weihu Ma,Gongming Yu,Dipika Patel,Shuya Jin,Yufeng Wang,Yuechao Yu,Qingwu Zhou,Peng Wang,Liyuan Hu,Xiang Wang,Hongliang Zang,Qingqing Zhao,Lei Yang,Peiwei Wen,Feng Yang,Huiming Jia,Gaolong Zhang,Min Pan,Xiaoyu Wang,Haohan Sun,Meng Wang,Zhengguo Hu,Xiaohong Zhou,Yuhu Zhang,Hushan Xu,Minliang Liu,Hooi-Jin Ong,Weiqing Yang

Symmetry（2021）

Cited 6|Views31
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Abstract
The study of the origin of asymmetries in mirror β decay is extremely important to understand the fundamental nuclear force and the nuclear structure. The experiment was performed at the National Laboratory of Heavy Ion Research Facility in Lanzhou (HIRFL) to measure the β-delayed γ rays of 26P by silicon array and Clover-type high-purity Germanium (HPGe) detectors. Combining with results from the β decay of 26P and its mirror nucleus 26Na, the mirror asymmetry parameter δ ( ≡ft+/ft−− 1) was determined to be 46(13)% for the transition feeding the first excited state in the daughter nucleus. Our independent results support the conclusion that the large mirror asymmetry is close to the proton halo structure in 26P.
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isospin symmetry breaking,<i>β</i>-delayed <i>γ</i> decay,shell-model calculation,halo structure,clover-type HPGe detector
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