An Isoratio Method and an Isoratio Scaling Phenomenon in Heavy-Ion Collisions  

作　　者：马春旺 乔春源 

机构地区：[1]Institute of Particle and Nuclear Physics, Henan Normal University

出　　处：《Communications in Theoretical Physics》2016年第7期115-121,共7页理论物理通讯（英文版）

基　　金：Supported by the Program for Science and Technology Innovation Talents in Universities of Henan Province under Grant No.13HASTIT046

摘　　要：An isoratio method is proposed to study the chemical potential of neutrons(protons) from the yield ratio of isotopes(isotones) differing in neutron-excess(I = N- Z). The measured fragments in the 140 A MeV ^(40),^(48) Ca and^(58),^(64) Ni +~9Be reactions, as well as those in the simulated^(58),^(64) Ni +~9Be reactions by using the antisymmetric molecular dynamics(AMD) model plus the secondary decay model gemini, have been adopted to perform the isoratio analysis.The results of the isoratio method verify that they are similar to that of the well known isoscaling method. The isoratio scaling phenomenon suggested by the isoratio method has also been found in the measured data and the fragments simulated by the AMD + gemini models.

关 键 词：isobaric ratio isoscaling AMD model projectile fragmentation asymmetric matter 

分 类 号：O571.6[理学—粒子物理与原子核物理] TQ085.4[理学—物理]