Probing the density dependence of the symmetry energy with central heavy ion collisions

查看全文 作　　者：XIE [1,2,3]Wenjie;ZHANG [1,2,4]Fengshou

机构地区：[1]The Key Laboratory of Beam Technology and Material Modification of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University;[2]Beijing Radiation Center;[3]Department of Physics,Yuncheng University;[4]Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou

出　　处：《Nuclear Science and Techniques》索引2013年第24卷第5期,共6页

基　　金：Supported by National Natural Science Foundation of China(NSFC) projects (Nos.11025524 and 11161130520);National Basic Research Program of China(No.2010CB832903) 摘　　要：An improved isospin dependent Boltzmann Langevin model,in which the inelastic channels and momentum dependent interactions are incorporated,is used to investigate the high-density behavior of nuclear symmetry energy.By taking several forms of nuclear symmetry energy,we calculate the time evolutions of neutron over proton ratio,π multiplicity and π-/π+ ratio,and the kinetic energy and transverse momentum spectra of π-/π+ ratio in the heavy ion collisions at 400A MeV.It is found that the neutron over proton ratio and π-/π+ ratio are very sensitive to the nuclear symmetry energy,and the π-is more sensitive to the nuclear symmetry energy than the π+.A supersoft symmetry energy results in a larger π-/π+ ratio. 关键词：重离子碰撞对称能 BOLTZMANN 中央密度探测同位旋相关相互作用

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Probing the density dependence of the symmetry energy with central heavy ion collisions

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