Density effect of the neutron halo nucleus induced reactions in intermediate energy heavy ion collisions  

作　　者：曹喜光 陈金根 马余刚 方德清 田文栋 颜廷志 蔡翔舟 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]Graduate University of Chinese Academy of Sciences,Beijing 100080,China

出　　处：《Chinese Physics C》2009年第S1期49-51,共3页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10775168,10405032,10605036,10747163,10505026,10535010,10775167);Shanghai Development Foundation for Science and Technology(06QA14062,06JC14082,05XD14021);Major State Basic Research Development Program in China(2007CB815004);Knowledge Innovation Project of Chinese Academy of Sciences(KJCX3.SYW.N2);Knowledge Innovation Program of Chinese Academy of Sciences(55010701,55010703)

摘　　要：Using an isospin-dependent quantum molecular dynamics (IQMD) model, we study the 15C induced reactions from 30—120 MeV/nucleon systematically. Here the valence neutron of 15C is assigned at both 1d5/2 and 2s1/2 states respectively in order to study the density effect of reaction mechanism. It is believed that the existent neutron halo structure at the 2s1/2 state of 15C will affect the light particle emission evidently. In our calculation, the different density distributions of 15C at two states are calculated by relativistic mean field (RMF) model and introduced in the initiation of IQMD model, respectively. It is found that some observables such as emission fragmentation multiplicity, emission neutron/proton ratio and emission neutrons’ kinetic energy spectrum are sensitive to the initial density distribution.Using an isospin-dependent quantum molecular dynamics (IQMD) model, we study the 15C induced reactions from 30—120 MeV/nucleon systematically. Here the valence neutron of 15C is assigned at both 1d5/2 and 2s1/2 states respectively in order to study the density effect of reaction mechanism. It is believed that the existent neutron halo structure at the 2s1/2 state of 15C will affect the light particle emission evidently. In our calculation, the different density distributions of 15C at two states are calculated by relativistic mean field (RMF) model and introduced in the initiation of IQMD model, respectively. It is found that some observables such as emission fragmentation multiplicity, emission neutron/proton ratio and emission neutrons’ kinetic energy spectrum are sensitive to the initial density distribution.

关 键 词：neutron halo nucleus valence neutron density e?ect IQMD RMF 

分 类 号：O571.6[理学—粒子物理与原子核物理]