Symmetry energy and neutron pressure of finite nuclei using the relativistic mean-field formalism
Document Type
Article
Publication Date
1-1-2021
Abstract
The present study investigates the isospin and Z-dependency of the effective symmetry energy and its co-efficient, namely, neutron pressure for the isotonic chain of neutron magic N = 40, and 82. The relativistic mean-field model with the non-linear NL3* parameter and Relativistic-Hartree-Bogoliubov approach with density-dependent DD-ME2 parameter sets are used for the analysis. The coherent density fluctuation model and Liquid-Drop-Approximation are adopted to formulate the nuclear matter observables such as symmetry energy, neutron pressure of finite nuclei at local density. We found a notable sign of the shell/sub-shell closure following the proton magic over the isotonic chain. Further, a comparative analysis shows that the coherent density fluctuation model is a better approximation to include the surface effect of finite nuclei as compared to the Liquid-Drop-Approximation, which plays a significant role to determine the shell/sub-shell closure over an isotopic and/or isotonic chain.
Keywords
Relativistic mean-field model, Relativistic-Hartree-Bogoliubov approach, Coherent density fluctuation model, Local density approximation, Symmetry energy, Neutron pressure, Infinite nuclear matter, Shell/sub-shell closure
Divisions
PHYSICS
Funders
Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ),Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) (2017/05660-0),FOSTECT (FOSTECT.2019B.04)
Publication Title
Astronomische Nachrichten
Volume
342
Issue
1-2, S
Publisher
Wiley-V C H Verlag GMBH
Publisher Location
POSTFACH 101161, 69451 WEINHEIM, GERMANY