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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Temperature effects on nuclear pseudospin symmetry in the Dirac-Hartree-Bogoliubov formalism

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Lisboa, R. [1] ; Alberto, P. [2] ; Carlson, B. V. [3] ; Malheiro, M. [3]
Total Authors: 4
[1] Univ Fed Rio Grande do Norte, Escola Ciencias & Tecnol, BR-59078970 Natal, RN - Brazil
[2] Univ Coimbra, Phys Dept, CFisUC, P-3004516 Coimbra - Portugal
[3] Ctr Tecn Aeroesp, Dept Fis, Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Physical Review C; v. 96, n. 5 NOV 8 2017.
Web of Science Citations: 0

We present finite-temperature Dirac-Hartree-Bogoliubov (FTDHB) calculations for the tin isotope chain to study the dependence of pseudospin on the nuclear temperature. In the FTDHB calculation, the density dependence of the self-consistent relativistic mean fields, the pairing, and the vapor phase that takes into account the unbound nucleon states are considered self-consistently. The mean-field potentials obtained in the FTDHB calculations are fit by Woods-Saxon (WS) potentials to examine how the WS parameters are related to the energy splitting of the pseudospin pairs as the temperature increases. We find that the nuclear potential surface diffuseness is the main driver for the pseudospin splittings and that it increases as the temperature grows. We conclude that pseudospin symmetry is better realized when the nuclear temperature increases. The results confirm the findings of previous works using relativistic mean field theory at T = 0, namely that the correlation between the pseudospin splitting and the parameters of the Woods-Saxon potentials implies that pseudospin symmetry is a dynamical symmetry in nuclei. We show that the dynamical nature of the pseudospin symmetry remains when the temperature is considered in a realistic calculation of the tin isotopes, such as that of the Dirac-Hartree-Bogoliubov formalism. (AU)

FAPESP's process: 13/26258-4 - Superdense matter in the universe
Grantee:Manuel Máximo Bastos Malheiro de Oliveira
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/05660-0 - Theoretical studies of the structure and reactions of exotic nuclei and many-body systems
Grantee:Brett Vern Carlson
Support type: Research Projects - Thematic Grants