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

Znanstveni rad - Izvorni znanstveni rad

• Autor: Esra Yüksel
• Autor: Nils Paar
• Autor: G. Colò
• Autor: E. Khan
• Autor: Y. F. Niu
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

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 β decays, electron capture, and neutrino-nucleus reactions.

• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review C
• Brojčani podaci: vol. 101, br. 4, 044305
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.101.044305
• URN:NBN: urn:nbn:hr:217:421919
• Datum objave publikacije: 2020
• Projekt: Šifra: KK.01.1.1.01.0004; Naziv (hrvatski): Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri; Kratica: ZCI QuantiXLie; Voditelj: Hrvoje Buljan; Pravna nadležnost: Hrvatska; Financijer: MZO; Linija financiranja: ZC
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevC.101.044305
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2020 American Physical Society. Received 17 September 2019; revised manuscript received 13 February 2020; accepted 18 March 2020; published 10 April 2020.
• Datum i vrijeme pohrane: 2020-10-09 19:32:35