Pairing transitions in finite-temperature relativistic Hartree-Bogoliubov theory

Scientific paper - Original scientific paper

• Author: Y.F. Niu
• Author: Z.M. Niu
• Author: Nils Paar
• Author: Dario Vretenar
• Author: G.H. Wang
• Author: J.S. Bai
• Author: Jie Meng
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): pairing; relativistic Hartree-Bogoliubov model; finite-temperature
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review C - Nuclear Physics
• Numbering: vol. 88, no. 3, 034308
• p-ISSN: 0556-2813
• e-ISSN: 1089-490X
• DOI: https://doi.org/10.1103/PhysRevC.88.034308
• URN:NBN: urn:nbn:hr:217:518408
• Publication: 2013
• Project: Number: 119-1191005-1010; Title (croatian): Nuklearna struktura i nuklearna astrofizika; Leader: Dario Vretenar; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.88.034308
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2013) by the American Physical Society. Received 19 June 2013; revised manuscript received 21 August 2013; published 6 September 2013.
• Created on: 2019-11-26 19:17:34