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 

机构地区：[1]Department of Physics,Tsinghua University,Beijing 100084,China [2]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [3]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [4]Institute of Physics,Maria Curie Skłodowska University,Lublin 20031,Poland

出　　处：《Nuclear Science and Techniques》2022年第4期1-9,共9页核技术（英文）

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)。

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.

关 键 词：Fast fission Heavy ion reactions Parallelplate avalanche counter CSHINE 

分 类 号：TL817.6[核科学技术—核技术及应用]