Density isomer of nuclear matter in an equivalent mass approach  

作　　者：GAO Li 2LU Zhenyan PENG Guangxiong 

机构地区：[1]College of Physics,University of Chinese Academy of Sciences [2]Department of Physics,Shandong University of Technology [3]Theoretical Physics Center for Science Facilities,Institute of High Energy Physics

出　　处：《Nuclear Science and Techniques》2013年第5期24-30,共7页核技术（英文）

基　　金：Supported by National Natural Science Foundation of China(NSFC) Projects (Nos.11135011 and 11045006);the key project from Chinese Academy of Sciences(No.12A0A0012)

摘　　要：The equation of state of symmetric nuclear matter is studied with an equivalent mass model.The equivalent mass of a nucleon has been expanded to order 4 in density.We first determine the first-order expansion coefficient in the quantum hadron dynamics,then calculate the coefficients of the second to fourth order for the given binding energy and incompressibility at the normal nuclear saturation density.It is found that there appears a density isomeric state if the incompressibility is smaller than a critical value.The model dependence of the conclusion has also been checked by varying the first-order coefficient.The equation of state of symmetric nuclear matter is studied with an equivalent mass model. The equivalent mass of a nucleon has been expanded to order 4 in density. We first determine the first-order expansion coefficient in the quantum hadron dynamics, then calculate the coefficients of the second to fourth order for the given binding energy and incompressibility at the normal nuclear saturation density. It is found that there appears a density isomeric state if the incompressibility is smaller than a critical value. The model dependence of the conclusion has also been checked by varying the first-order coefficient.

关 键 词：核物质状态方程 饱和密度 质量方针 异构体 等效 量子强子动力学 质量模型 膨胀系数 

分 类 号：O571[理学—粒子物理与原子核物理]