Pairing transitions in finite-temperature relativistic Hartree-Bogoliubov theory

Niu, Y. F. and Niu, Z. M. and Paar, Nils and Vretenar, Dario and Wang, G. H. and Bai, J. S. and Meng, Jie (2013) Pairing transitions in finite-temperature relativistic Hartree-Bogoliubov theory. Physical Review C, 88 (3). pp. 34308-8. ISSN 0556-2813

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We formulate the finite-temperature relativistic Hartree-Bogoliubov theory for spherical nuclei based on a point-coupling functional, with the Gogny or separable pairing force. Using the functional PC-PK1, the framework is applied to the study of pairing transitions in Ca, Ni, Sn, and Pb isotopic chains. The separable pairing force reproduces the gaps calculated with the Gogny force not only at zero temperature, but also at finite temperatures. By performing a systematic calculation of the even-even Ca, Ni, Sn, and Pb isotopes, it is found that the critical temperature for a pairing transition generally follows the rule Tc=0.6Δn(0), where Δn(0) is the neutron pairing gap at zero temperature. This rule is further verified by adjusting the pairing gap at zero temperature with a strength parameter.

Item Type: Article
Keywords: pairing, relativistic Hartree-Bogoliubov model, finite-temperature
Date: September 2013
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2013) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 09 Jun 2014 12:44
Last Modified: 23 Feb 2016 15:20

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