The influence of Multi-Step Sequential Decay on Isoscaling and Fragment Isospin Distribution in GEMINI Simulation  

作　　者：ZHOU Pei TIAN Wen-Dong MA Yu-Gang CAI Xiang-Zhou FANG De-Qing WANG Hong-Wei 周培;田文栋;马余刚;蔡翔舟;方德清;王宏伟(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,PO Box 800-204,Shanghai 201800;Graduate School of the Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,PO Box 800-204,Shanghai 201800 [2]Graduate School of the Chinese Academy of Sciences,Beijing 100049

出　　处：《Chinese Physics Letters》2011年第6期82-85,共4页中国物理快报（英文版）

基　　金：by the National Natural Science Foundation of China under Grant Nos 10875160,1097907 and 11035009;the National Basic Research Program of China under Grant No 2007CB815004;the Knowledge Innovation Project of Chinese Academy of Sciences under Grants No KJCX2-EW-N01;the Shanghai Development Foundation for Science and Technology under Grant No 09JC1416800.

摘　　要：Extensive calculations on isoscaling behavior with the sequential-decay model GEMINI are performed for the mediate-heavy nuclei in the mass range A=110 and at excitation energies of up to 3 MeV per nucleon.Isoscaling can still be observed after entire−step decays are considered for the light products as in the only first-step decay process case.Comparison between the products after the first-step decay and the ones after entire-step decay demonstrates that multi-step secondary sequential decay strongly influences the isoscaling parametersα,βas well as the fragment isospin distribution.After entire−step decays,the isoscaling parametersαandβare decreased and the fragment isospin distribution can better reproduce the isospin distribution shape as the experimental data.

关 键 词：SCALING DECAY excitation 

分 类 号：O57[理学—粒子物理与原子核物理]