Mass dependence of pion-induced fission cross sections on the level density parameter

查看全文 作　　者：Zafar [1]Yasin;Warda [2]Iram;M.Ikram [1]Shahzad 机构地区：[1]Physics Division,PINSTECH,P.O.Nilore,Islamabad,Pakistan;[2]Physics Department,Islamia University,Bahawalpur,Pakistan 出　　处：《Chinese Physics C》索引2012年第36卷第9期,共5页 摘　　要：Fission probabilities and fission cross sections strongly depend on the mass number of the target and energy of the projectile.In this research work,a cascade-exciton model(using CEM95 computer code) has been implemented to observe the dependence of pion-induced fission cross sections and fission probabilities on the target mass and ratio of the level density parameter in fission to neutron emission.The analysis has been performed for both the positive and negative pions as the projectile at 80,100 and 150 MeV energies.The computed cross sections satisfactorily reproduced the experimental findings when compared with the available experimental data in the literature.We observed a smooth dependence at 150 MeV,and a sharper dependence at 80 and 100 MeV pion energy,in the fissility region above 29.44. 关 键 词：能级密度参数 变截面 质量数 介子 计算机代码 发裂 实验数据 中子发射