Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temperature dependence of the symmetry energy and neutron skins in Ni,
  Sn, and Pb isotopic chains   The temperature dependence of the symmetry energy for isotopic chains of
even-even Ni, Sn, and Pb nuclei is investigated in the framework of the local
density approximation (LDA). The Skyrme energy density functional with two
Skyrme-class effective interactions, SkM* and SLy4, is used in the
calculations. The temperature-dependent proton and neutron densities are
calculated through the HFBTHO code that solves the nuclear
Skyrme-Hartree-Fock-Bogoliubov problem by using the cylindrical transformed
deformed harmonic-oscillator basis. In addition, two other density
distributions of $^{208}$Pb, namely the Fermi-type density determined within
the extended Thomas-Fermi (TF) method and symmetrized-Fermi local density
obtained within the rigorous density functional approach, are used. The kinetic
energy densities are calculated either by the HFBTHO code or, for a comparison,
by the extended TF method up to second order in temperature (with $T^{2}$
term). Alternative ways to calculate the symmetry energy coefficient within the
LDA are proposed. The results for the thermal evolution of the symmetry energy
coefficient in the interval $T=0-4$ MeV show that its values decrease with
temperature. The temperature dependence of the neutron and proton
root-mean-square radii and corresponding neutron skin thickness is also
investigated, showing that the effect of temperature leads mainly to a
substantial increase of the neutron radii and skins, especially in the more
neutron-rich nuclei, a feature that may have consequences on astrophysical
processes and neutron stars.

5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
3
The categories of this paper are: physics