Critical parameters of the liquid-gas phase transition in thermal symmetric and asymmetric nuclear matter
Critical parameters of the liquid-gas phase transition in thermal symmetric and asymmetric nuclear matter
复制标题
热对称和不对称核物质中液-气相变的关键参数
DOI：
10.1103/physrevc.100.054314
复制
发表时间：
2019-06
影响因子：
3.1
通讯作者：
Bao Yuan Sun
中科院分区：
文献类型：
--
作者：
Shen Yang;Bo Nan Zhang;Bao Yuan Sun
利用协变密度泛函理论研究了热对称和非对称核物质中液-气相变的临界参数和相图结构。虽然不确定性仍然在预测的临界参数，如临界温度和压力从各种CDF泛函，几个相关性进行了探讨，数值和验证它们之间近似线性。当核物质具有更强的同位旋非对称性时，这些关联变得更糟，这主要是由对称性能量引起的。通过考察临界温度与同位旋的关系，认识到对称能在非对称物质LG跃迁性质中的作用。临界温度随同位旋不对称性的变化与饱和密度下对称能的密度斜率有很好的相关性，并受密度斜率的约束。然后，对热核物质相图的结构进行了细致的分析。结果表明，对称能的贡献决定了气液两相共存区的大小。此外，通过几个特征点的温度与压力的关联，可以确定热核物质在非零同位旋不对称性下的临界温度，从而确定热核物质的具体相图模式，为进一步探索热核物质液-气相图的结构奠定了基础。
The properties of critical parameters and phase diagram structure of liquid-gas phase transition are investigated in thermal symmetric and asymmetric nuclear matter with the covariant density functional (CDF) theory. Although uncertainty remains in predicting the critical parameters such as the critical temperature and pressure from various CDF functionals, several correlations are explored numerically and verified to be approximately linear between them. These correlations become worse when nuclear matter is more isospin asymmetric, resulting mainly from the effects induced by symmetry energy. By looking over the isospin dependence of the critical temperature, the role of the symmetry energy in LG transition properties of asymmetric matter is realized. The change of critical temperature with isospin asymmetry is found to be correlated well with and as a consequence could be constrained by the density slope of symmetry energy at saturation density. Then, the structure of phase diagram of thermal nuclear matter is analyzed carefully. It is revealed that the contribution from symmetry energy dominates the size of liquid-gas phase coexistence area. Moreover, the specific pattern of the phase diagram could be determined by the critical temperature at non-zero isospin asymmetry, illustrated from the correlations of the temperature with pressures at several characteristic points, paving the possible way to further explore the structure of liquid-gas phase diagram of thermal nuclear matter.
登录
查看更多内容
影响因子：
3.6
作者：
Zong Yao Yao;Sun Bao Yuan
通讯作者：
Sun Bao Yuan
影响因子：
3.1
作者：
J. Kapusta
通讯作者：
J. Kapusta
影响因子：
3.1
作者：
W. Zuo;Z. H. Li;A. Li;G. Lu
通讯作者：
W. Zuo;Z. H. Li;A. Li;G. Lu
影响因子：
6.3
作者：
Zhi-gang Gong;L. Zejda;Werner DappenJosep M. Aparicio
通讯作者：
Zhi-gang Gong;L. Zejda;Werner DappenJosep M. Aparicio
DOI：
10.1016/j.physrep.2004.10.002
发表时间：
2004-10
期刊：
Physics Reports
影响因子：
--
作者：
C.B.Das;S.Das Gupta;W.G.Lynch;A.Z.Mekjian;M.B.Tsang
通讯作者：
C.B.Das;S.Das Gupta;W.G.Lynch;A.Z.Mekjian;M.B.Tsang