Naslov
Gamow-Teller excitations at finite temperature: Competition between pairing and temperature effects

Autori
Yüksel, E. ; Paar, N. ; Colò, G. ; Khan, E. ; Niu, Y. F.

Izvornik
Physical Review C (2469-9985) 101 (2020), 4; 044305-1

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

Ključne riječi
Gamow-Teller transitions, finite temperature

Sažetak
The relativistic and nonrelativistic finite temperature proton-neutron quasiparticle random phase approximation (FT-PNQRPA) methods are developed to study the interplay of the pairing and temperature effects on the Gamow-Teller excitations in open-shell nuclei, as well as to explore the model dependence of the results by using two rather different frameworks for effective nuclear interactions. The Skyrme-type functional SkM* is employed in the nonrelativistic framework, while the density-dependent meson-exchange interaction DD-ME2 is implemented in the relativistic approach. Both the isoscalar and isovector pairing interactions are taken into account within the FT-PNQRPA. Model calculations show that below the critical temperatures the Gamow-Teller excitations display a sensitivity to both the finite temperature and pairing effects, and this demonstrates the necessity for implementing both in the theoretical framework. The established FT-PNQRPA opens perspectives for the future complete and consistent description of astrophysically relevant weak interaction processes in nuclei at finite temperature such as beta decays, electron capture, and neutrino-nucleus reactions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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