论文标题
重建重离子反应中的裂变事件与Cshine
Reconstruction of Fission Events in Heavy Ion Reactions with CSHINE
论文作者
论文摘要
我们报告了25 meV/u $^{86} $ kr +$^{208} $ pb反应在紧凑型光谱仪（cshine）中的快速裂变事件的重建方法。裂变片段通过三个大面积平行板雪崩计数器进行测量，这些板块可以传递碎片的位置和到达的时机信息。启动定时信息由回旋子的射频给出。使用两个裂变片段的速度，重建了裂变事件。根据快速裂变的情况，裂变片段的速度分布和方位角差异随着折叠角的范围而扩大。裂变轴的各向异性角分布也始终揭示了裂变事件的动态特征。
We report the reconstruction method of the fast fission events in 25 MeV/u $^{86}$Kr +$^{208}$Pb reactions at the Compact Spectrometer for Heavy IoN Experiment (CSHINE). The fission fragments are measured by three large-area parallel plate avalanche counters, which can deliver the position and the arrival timing information of the fragments. The start timing information is given by the radio frequency of the cyclotron. Using the velocities of the two fission fragments, the fission events are reconstructed. The broadening of both the velocity distribution and the azimuthal difference of the fission fragments decrease with the folding angle, in accordance with the picture that fast fission occurs. The anisotropic angular distribution of the fission axis also reveals consistently the dynamic feature the fission events.
