标题：Density isomer of nuclear matter in an equivalent mass approach
作者：Gao Li; Lu Zhenyan; Peng Guangxiong
作者机构：[Gao Li; Lu Zhenyan; Peng Guangxiong] Univ Chinese Acad Sci, Coll Phys, Beijing 100049, Peoples R China.; [Gao Li] Shandong Univ Technol, Dept Phys, 更多
通讯作者地址：[Peng, GX]Univ Chinese Acad Sci, Coll Phys, Beijing 100049, Peoples R China.
来源：NUCLEAR SCIENCE AND TECHNIQUES
关键词：Density isomer; Equivalent mass; Nuclear equation of state
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.