Langevin study of neutron emission in the reactions ^(16)O+^(181)Ta and ^(19)F+^(178)Hf  

作　　者：叶巍 吴锋 杨宏伟 

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

出　　处：《Chinese Physics C》2008年第10期816-819,共4页中国物理C（英文版）

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

摘　　要：The pre-scission neutrons measured in the reactions ^16O＋^181Ta and ^19F＋^178Hf are studied via a Langevin equation coupled with a statistical decay model. We find that because of the mass asymmetry of different entrance channels, the spin distributions of compound nuclei would be different, consequently, the measured neutrons in these two reactions would also different. This means that the entrance channel will affect the particle emission in the fission process of hot nuclei.The pre-scission neutrons measured in the reactions ^16O＋^181Ta and ^19F＋^178Hf are studied via a Langevin equation coupled with a statistical decay model. We find that because of the mass asymmetry of different entrance channels, the spin distributions of compound nuclei would be different, consequently, the measured neutrons in these two reactions would also different. This means that the entrance channel will affect the particle emission in the fission process of hot nuclei.

关 键 词：pre-scission neutron multiplicity entrance channel mass asymmetry compound nucleus spin distribution Langevin equation 

分 类 号：O571.5[理学—粒子物理与原子核物理] O414.2[理学—物理]