Langevin analysis of fission excitation functions induced by protons  

作　　者：田舰 王宁 叶巍 

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

出　　处：《Chinese Physics C》2015年第3期19-23,共5页中国物理C（英文版）

基　　金：Supported by National Nature Science Foundation of China(11075034)

摘　　要：The stochastic Langevin approach to fission is applied to analyze fission excitation functions measured in p＋206Pb and p＋209Bi systems. A presaddle friction strength of （3 5） ×1021 s -1 is extracted by comparing theoretical predictions with experimental data. Furthermore, the small distortion of the formed compound nuclei with respect to the spherical shape under the condition of low angular momentum suggests that experimentally, populating an excited compound system via light-ion induced reactions favors a more accurate determination of presaddle friction with a fission cross section.The stochastic Langevin approach to fission is applied to analyze fission excitation functions measured in p＋206Pb and p＋209Bi systems. A presaddle friction strength of （3 5） ×1021 s -1 is extracted by comparing theoretical predictions with experimental data. Furthermore, the small distortion of the formed compound nuclei with respect to the spherical shape under the condition of low angular momentum suggests that experimentally, populating an excited compound system via light-ion induced reactions favors a more accurate determination of presaddle friction with a fission cross section.

关 键 词：compound nucleus decay fission excitation function nuclear dissipation 

分 类 号：O572.341[理学—粒子物理与原子核物理]