Effects of N/Z on survival probability of heavy nuclei  

作　　者：叶巍 杨宏伟 

机构地区：[1]Department of Physics Southeast University

出　　处：《Chinese Physics C》2008年第1期49-51,共3页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10405007)

摘　　要：The excitation functions of the evaporation residue formation probability of three heavy nuclei ^194pb, ^200Pb and ^206pb are calculated by using a Langevin equation coupled with a statistical decay model. The results show that the neutron-to-proton ratio （N/Z） of a compound nucleus has an effect on survival probability and this effect becomes larger with increasing N/Z. This is because the fission barrier and the pre-saddle particle emission depend on the N/Z ratio of the system.The excitation functions of the evaporation residue formation probability of three heavy nuclei ^194pb, ^200Pb and ^206pb are calculated by using a Langevin equation coupled with a statistical decay model. The results show that the neutron-to-proton ratio （N/Z） of a compound nucleus has an effect on survival probability and this effect becomes larger with increasing N/Z. This is because the fission barrier and the pre-saddle particle emission depend on the N/Z ratio of the system.

关 键 词：N/Z effect survival probability pre-saddle particle multiplicity Langevin equation 

分 类 号：O571[理学—粒子物理与原子核物理]