【作者】
马军兵；
寺嶋知；
王惠仁；
孙志宇；
杨彦云；
叶沿林；
楼建玲；
王建松；
韩家兴；
马朋；
王康；
张志超；
金树亚；
段芳芳；
杨过；
吕冰锋；
徐晓栋；
白真；
许世伟；
杨彪；
刘洋；
白世伟；
马凯；
陈家豪；
李根；
胡梓瑶；
谭智威；
阳黎升；
王姝婧；
陶龙春；
刘威；
蒋颖；
李晶晶；
宋玉收；
胡力元；
李垚；
李俊威；
张苏雅拉吐；
黄美容；
王德鑫；
【Author】
Jun-Bing Ma;Satoru Terashima;Hooi-Jin Ong;Zhi-Yu Sun;Yan-Yun Yang;Yan-Lin Ye;Jian-Ling Lou;Jian-Song Wang;Jia-Xing Han;Peng Ma;Kang Wang;Zhi-Chao Zhang;Shu-Ya Jin;Fang-Fang Duan;Guo Yang;Bing-Feng Lv;Xiao-Dong Xu;Zhen Bai;Shi-Wei Xu;Biao Yang;Yang Liu;Shi-Wei Bai;Kai Ma;Jia-Hao Chen;Gen Li;Zi-Yao Hu;Zhi-Wei Tan;Li-Sheng Yang;Shu-Jing Wang;Long-Chun Tao;Wei Liu;Ying Jiang;Jing-Jing Li;Yu-Shou Song;Li-Yuan Hu;Yao Li;Jun-Wei Li;Suyalatu Zhang;Mei-Rong Huang;De-Xin Wang;Institute of Modern Physics,Chinese Academy of Sciences;School of Nuclear Science and Technology,University of Chinese Academy of Sciences;State Key Laboratory of Heavy Ion Science and Technology,Institute of Modern Physics,Chinese Academy of Sciences;Research Center for Nuclear Physics,Osaka University;RIKEN Nishina Center;Joint Department for Nuclear Physics,Lanzhou University and Institute of Modern Physics,Chinese Academy of Sciences;School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University;School of Science,Huzhou University;Fundamental Science on Nuclear Safety and Simulation Technology Laboratory,Harbin Engineering University;Institute of Nuclear Physics,Inner Mongolia Minzu University;
【机构】
Institute of Modern Physics,Chinese Academy of Sciences；
School of Nuclear Science and Technology,University of Chinese Academy of Sciences；
State Key Laboratory of Heavy Ion Science and Technology,Institute of Modern Physics,Chinese Academy of Sciences；
Research Center for Nuclear Physics,Osaka University；
RIKEN Nishina Center；
Joint Department for Nuclear Physics,Lanzhou University and Institute of Modern Physics,Chinese Academy of Sciences；
School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University；
School of Science,Huzhou University；
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory,Harbin Engineering University；
Institute of Nuclear Physics,Inner Mongolia Minzu University；
【摘要】 Invariant-mass spectroscopy has been performed to search for possible resonance states in the loosely bound neutron-rich 15C nucleus.By detecting alpha and 11Be in coincidence,we reconstruct the excitation energy spectrum for 15C.To estimate the physical background from non-resonant prompt alpha particles,we employ a recently proposed weighted event-mixing method with phenomenological reduced weighting at around the alpha-decay threshold to account for the depletion in the prompt alpha’s contribution owing likely to the Coulomb final-state interactions.A new weighted mixed-event method that focuses on a robust treatment of the Coulomb effect is also proposed.Through fitting the spectrum using the background estimated with these two methods,up to two resonance state candidates are proposed.Further experiments with improved statistics and theoretical calculations are called for to confirm the se resonance states.更多还原
【Abstract】 Invariant-mass spectroscopy has been performed to search for possible resonance states in the loosely bound neutron-rich 15C nucleus.By detecting alpha and 11Be in coincidence,we reconstruct the excitation energy spectrum for 15C.To estimate the physical background from non-resonant prompt alpha particles,we employ a recently proposed weighted event-mixing method with phenomenological reduced weighting at around the alpha-decay threshold to account for the depletion in the prompt alpha’s contribution owing likely to the Coulomb final-state interactions.A new weighted mixed-event method that focuses on a robust treatment of the Coulomb effect is also proposed.Through fitting the spectrum using the background estimated with these two methods,up to two resonance state candidates are proposed.Further experiments with improved statistics and theoretical calculations are called for to confirm the se resonance states.更多还原
【基金】 Supported partially by the National Natural Science Foundation of China (12175009, 12175280, 12250610193, 11605253, 12275007);National Key Research and Development Program of China (2023YFA1606702);the International Partnership Program of the Chinese Academy of Sciences (016GJHZ2023063GC);Major Science and Technology Projects in Gansu Province (24GD13GA005);the support of the CAS “Light of West China” Program;the support of the Natural Science Foundation of Gansu (23JRRA676)
