Investigating the level structure of ^(206)Rn:evolution from seniority regime to collective dynamics  

作　　者：Rui Guo Li-Hua Zhu Jing-Bin Lu Guan-Jian Fu Meng Wang Bao-Hua Sun Gao-Long Zhang Zhen Ren Yi-Heng Wu Yun Zheng Chuang-Ye He Jin-Long Wang Xiao-Guang Wuand Shun-He Yao 郭瑞;竺礼华;陆景彬;傅冠健;王萌;孙保华;张高龙;任臻;吴义恒;郑云;贺创业;汪金龙;吴晓光;姚顺和(School of Physics,Beihang University,Beijing 100191,China;College of Physics,Jilin University,Changchun 130012,China;School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;School of Electronic Engineering and Intelligent Manufacturing,An Qing Normal University,Anqing 246133,China China;Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]School of Physics,Beihang University,Beijing 100191,China [2]College of Physics,Jilin University,Changchun 130012,China [3]School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [4]School of Electronic Engineering and Intelligent Manufacturing,An Qing Normal University,Anqing 246133,China China [5]Institute of Atomic Energy,Beijing 102413,China

出　　处：《Chinese Physics C》2024年第11期75-85,共11页中国物理C（英文版）

基　　金：Supported partially by the National Natural Science Foundation of China (10975191,U1867210,11375023,11475014,11575018,12075169,12322506);the National Key R&D program of China (2016YFA0400504)。

摘　　要：Excited states of ^(206)Rn have been examined via the 197 Au(^(14)N,5n)^(206)Rn fusion reaction at a beam energy of 78 MeV.A number of transitions and levels are identified by the γ-γ coincidence measurement,further enriching the level scheme of ^(206)Rn.The fullconfiguration shell model and nucleon-pair approximation(NPA)were utilized to investigate the single-particle configurations and seniority structures in ^(206)Rn.The results of these two calculations suggest that 2_(1)^(+) and 4_(1)^(+) states exhibit only a 50%component of a seniority-two state associated with a broken neutron pair.The collectivity of these two states primarily arises from configuration mixing due to residual proton-neutron interactions.Furthermore,6_(1)^(+) and 8_(1)^(+) states are predominantly characterized by a seniority-two state marked by a broken proton pair.

关 键 词：γ-γcoincidence measurement levels shell model nucleon-pair approximation SENIORITY COLLECTIVITY 

分 类 号：O571[理学—粒子物理与原子核物理]