Reconstruction of fission events in heavy ion reactions with the compact spectrometer for heavy ion experiment

作     者：Xin-Yue Diao Fen-Hai Guan Yi-Jie Wang Yu-Hao Qin Zhi Qin Dong Guo Qiang-Hua Wu Da-Wei Si Xuan Zhao Sheng Xiao Yao-Peng Zhang Xiang-Lun Wei Hai-Chuan Zou He-Run Yang Peng Ma Rong-Jiang Hu Li-Min Duan Artur Dobrowolski Krzysztof Pomorski Zhi-Gang Xiao Xin-Yue Diao;Fen-Hai Guan;Yi-Jie Wang;Yu-Hao Qin;Zhi Qin;Dong Guo;Qiang-Hua Wu;Da-Wei Si;Xuan Zhao;Sheng Xiao;Yao-Peng Zhang;Xiang-Lun Wei;Hai-Chuan Zou;He-Run Yang;Peng Ma;Rong-Jiang Hu;Li-Min Duan;Artur Dobrowolski;Krzysztof Pomorski;Zhi-Gang Xiao

作者机构：Department of PhysicsTsinghua UniversityBeijing 100084China Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and TechnologyLanzhou UniversityLanzhou 730000China Institute of PhysicsMaria Curie Skłodowska UniversityLublin 20031Poland 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2022年第33卷第4期

页      面：1-9页

核心收录：

学科分类：082704[工学-辐射防护及环境保护] 08[工学] 0827[工学-核科学与技术] 

基　　金：supported by the National Natural Science Foundation of China(Nos.11875174,11961131010,and 11961141004) the Polish National Science Center(No.2018/30/Q/ST2/00185) 

主　　题：Fast fission Heavy ion reactions Parallelplate avalanche counter CSHINE 

摘      要：We report a reconstruction method for fast-fission events in 25 MeV/u^(86)Kr +^(208)Pb reactions at the Compact Spectrometer for Heavy Ion Experiment(CSHINE). The fission fragments(FFs) are measured using three large-area parallel-plate avalanche counters, which can deliver the position and arrival timing information of the fragments. The start timing information is provided by the radio frequency of the cyclotron. Fission events were reconstructed using the velocities of the two FFs. The broadening of both the velocity distribution and azimuthal difference of the FFs decreases with the folding angle, in accordance with the picture that fast fission occurs. The anisotropic angular distribution of the fission axis also consistently reveals the dynamic features of fission events.