Naslov
Pairing transitions in finite-temperature relativistic Hartree-Bogoliubov theory

Autori
Niu, Y.F. ; Niu, Z.M. ; Paar, Nils ; Vretenar, Dario ; Wang, G.H. ; Bai, J.S. ; Meng, Jie

Izvornik
Physical Review C - Nuclear Physics (0556-2813) 88 (2013), 3; 034308-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Pairing; relativistic Hartree-Bogoliubov model; finite-temperature

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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