Yield ratios and directed flows of light fragments from reactions induced by neutron-rich nuclei at intermediate energy  

作　　者：颜廷志 李龙龙 王瑞丰 颜廷锋 

机构地区：[1]School of Energy Resources and Power Engineering, Northeast Dianli University, Jilin 132012, China [2]School of Science, Shandong Jianzhu University, Jinan 250101, China [3]State Grid Tancheng Power Supply Company, Linyi 276100, China

出　　处：《Chinese Physics C》2017年第4期75-79,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11405025)

摘　　要：The yield ratios of neutron/proton and ^3H/^3He and the directed flow per nucleon for these projectile-like fragments at large impact parameters are studied for ^50Ca ＋ ^40Ca and ^50Cr ＋ ^40Ca for comparison at 50 MeV/u using the isospin-dependent quantum molecular dynamics（IQMD model.It is found that the yield ratios and the directed flows per nucleon are different for reactions induced by the neutron-rich nucleus ^50Ca and the stable isobaric nucleus ^50Cr,and depend on the hardness of the EOS.The ratios of neutron/proton and ^3H/^3He and the difference of directed flow per nucleon of neutron-proton are suggested to be possible observables to investigate the isospin effects.The yield ratios of neutron/proton and ^3H/^3He and the directed flow per nucleon for these projectile-like fragments at large impact parameters are studied for ^50Ca ＋ ^40Ca and ^50Cr ＋ ^40Ca for comparison at 50 MeV/u using the isospin-dependent quantum molecular dynamics（IQMD model.It is found that the yield ratios and the directed flows per nucleon are different for reactions induced by the neutron-rich nucleus ^50Ca and the stable isobaric nucleus ^50Cr,and depend on the hardness of the EOS.The ratios of neutron/proton and ^3H/^3He and the difference of directed flow per nucleon of neutron-proton are suggested to be possible observables to investigate the isospin effects.

关 键 词：yield ratio directed flow neutron-rich nuclei 

分 类 号：O571.5[理学—粒子物理与原子核物理]