Temperature dependence of the volume and surface contributions to the nuclear symmetry energy within the coherent density fluctuation model

A. N. Antonov, D. N. Kadrev, M. K. Gaidarov, P. Sarriguren, and E. Moya de Guerra
Phys. Rev. C 98, 054315 – Published 26 November 2018

Abstract

The temperature dependence of the volume and surface components of the nuclear symmetry energy (NSE) and their ratio is investigated in the framework of the local density approximation. The results of these quantities for finite nuclei are obtained within the coherent density fluctuation model (CDFM). The CDFM weight function is obtained using the temperature-dependent proton and neutron densities calculated through the HFBTHO code, which solves the nuclear Skyrme-Hartree-Fock-Bogoliubov problem by using the cylindrical transformed deformed harmonic-oscillator basis. We present and discuss the values of the volume and surface contributions to the NSE and their ratio obtained for the Ni, Sn, and Pb isotopic chains around double-magic Ni78, Sn132, and Pb208 nuclei. The results for the T dependence of the considered quantities are compared with estimations made previously for zero temperature showing the behavior of the NSE components and their ratio, as well as with the available experimental data. The sensitivity of the results on various forms of the density dependence of the symmetry energy is studied. We confirm the existence of “kinks” in these quantities as functions of the mass number at T=0 MeV for the double closed-shell nuclei Ni78 and Sn132 and the lack of kinks for the Pb isotopes, as well as the disappearance of these kinks as the temperature increases.

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  • Received 9 July 2018
  • Revised 15 October 2018

DOI:https://doi.org/10.1103/PhysRevC.98.054315

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

A. N. Antonov1, D. N. Kadrev1, M. K. Gaidarov1,*, P. Sarriguren2, and E. Moya de Guerra3

  • 1Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria
  • 2Instituto de Estructura de la Materia, IEM-CSIC, Serrano 123, E-28006 Madrid, Spain
  • 3Grupo de Física Nuclear, Departamento de Física Atómica, Molecular y Nuclear, Facultad de Ciencias Físicas, Unidad Asociada UCM-CSIC(IEM), Universidad Complutense de Madrid, E-28040 Madrid, Spain

  • *gaidarov@inrne.bas.bg

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Vol. 98, Iss. 5 — November 2018

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