Nuclear pasta structures and symmetry energy
Nuclear pasta structures and symmetry energy
复制标题
核面食结构和对称能量
DOI:
10.1103/physrevc.103.055812
复制
发表时间:
2020-12
期刊:
影响因子:
--
通讯作者:
Yingxun Zhang
中科院分区:
文献类型:
--
作者:
Chengjun Xia;Toshiki Maruyama;Nobutoshi Yasutake;Toshitaka Tatsumi;Yingxun Zhang
In the framework of the relativistic mean field model with Thomas-Fermi approximation, we study the structures of low density nuclear matter in a three-dimensional geometry with reflection symmetry. The numerical accuracy and efficiency are improved by expanding the mean fields according to fast cosine transformation and considering only one octant of the unit cell. The effect of finite cell size is treated carefully by searching for the optimum cell size. Typical pasta structures (droplet, rod, slab, tube, and bubble) arranged in various crystalline configurations are obtained for both fixed proton fractions and $\beta$-equilibration. It is found that the properties of droplets/bubbles are similar in body-centered cubic (BCC) and face-centered cubic (FCC) lattices, where the FCC lattice generally becomes more stable than BCC lattice as density increases. For the rod/tube phases, the honeycomb lattice is always more stable than the simple one. By introducing an $\omega$-$\rho$ cross coupling term, we further examine the pasta structures with a smaller slope of symmetry energy $L = 41.34$ MeV, which predicts larger onset densities for core-crust transition and non-spherical nuclei. Such a variation due to the reduction of $L$ is expected to have impacts on various properties in neutron stars, supernova dynamics, and binary neutron star mergers.
登录
查看更多内容
影响因子:
3.8
作者:
Li A.;Zhu Z.-Y.;Zhou E.-P.;Dong J.-M.;Hu J.-N.;Xia C.-J.
通讯作者:
Xia C.-J.
影响因子:
4.4
作者:
M. Tsang;W. G. Lynch;P. Danielewicz;C. Tsang
通讯作者:
M. Tsang;W. G. Lynch;P. Danielewicz;C. Tsang
影响因子:
4.8
作者:
H. Sotani;K. Iida;K. Oyamatsu
通讯作者:
H. Sotani;K. Iida;K. Oyamatsu
DOI:
10.3847/1538-4357/ab2edd
发表时间:
2019-05
期刊:
The Astrophysical Journal
影响因子:
--
作者:
L. R. Weih;E. Most;L. Rezzolla
通讯作者:
L. R. Weih;E. Most;L. Rezzolla
DOI:
10.1140/epja/i2019-12700-0
发表时间:
2018-07
期刊:
The European Physical Journal A
影响因子:
--
作者:
Nai-Bo Zhang;Bao-An Li
通讯作者:
Nai-Bo Zhang;Bao-An Li