Electromagnetic field effects on nucleon transverse momentum for heavy ion collisions around 100 A MeV  

作　　者：Xian-Gai Deng Yu-Gang Ma 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]ShanghaiTech University,Shanghai 200031,China

出　　处：《Nuclear Science and Techniques》2017年第12期255-261,共7页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.11421505,11305239,and 11220101005);the Major State Basic Research Development Program in China(No.2014CB845401);the Key Research Program of Frontier Sciences of CAS(No.QYZDJSSW-SLH002);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB16)

摘　　要：With taking electromagnetic field into account for the transport model of Boltzmann-Uehling-Uhlenbeck,electromagnetic effects are studied for ^(208)Pb +^(208)Pb collisions around 100A MeV. Electromagnetic field evolution during the collisions was estimated. It was found that the electric field has an obvious effect on the transverse momentum(p_T) spectra of nucleons during heavy ion collisions, and leads to different minimum position for the peak of p_T spectra of nucleons versus beam energy when the electric field is switched on. For the magnetic field, it affects the z-axis direction distributions of nucleons for central heavy ion collisions at lower energy.With taking electromagnetic field into account for the transport model of Boltzmann-Uehling-Uhlenbeck,electromagnetic effects are studied for ^(208)Pb +^(208)Pb collisions around 100A MeV. Electromagnetic field evolution during the collisions was estimated. It was found that the electric field has an obvious effect on the transverse momentum(p_T) spectra of nucleons during heavy ion collisions, and leads to different minimum position for the peak of p_T spectra of nucleons versus beam energy when the electric field is switched on. For the magnetic field, it affects the z-axis direction distributions of nucleons for central heavy ion collisions at lower energy.

关 键 词：Heavy ion COLLISION Electromagnetic field TRANSVERSE MOMENTUM 

分 类 号：O571.6[理学—粒子物理与原子核物理]