Global properties of nuclei at finite-temperature within the covariant energy density functional theory

Znanstveni rad - Izvorni znanstveni rad

• Autor: Ante Ravlić
• Autor: Esra Yüksel
• Autor: Tamara Nikšić
• Autor: Nils Paar
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

In stellar environments nuclei appear at finite temperatures, becoming extremely hot in core-collapse supernovae and neutron-star mergers. However, due to theoretical and computational complexity, most model calculations of nuclear properties are performed at zero temperature, while those existing at finite temperatures are limited only to selected regions of the nuclide chart. In this study we perform the global calculation of nuclear properties for even-even 8≤𝑍≤104 nuclei at temperatures in range 0≤𝑇≤2 MeV. Calculations are based on the finite-temperature relativistic Hartree-Bogoliubov model supplemented by the Bonche-Levit-Vautherin vapor subtraction procedure. We find that near the neutron-drip line the continuum states have significant contribution already at moderate temperature 𝑇≈1 MeV, thus emphasizing the necessity of the vapor subtraction procedure. Results include neutron emission lifetimes, quadrupole deformations, neutron-skin thickness, proton and neutron pairing gaps, entropy and excitation energy. Up to the temperature 𝑇≈1 MeV, the nuclear landscape is influenced only moderately by the finite-temperature effects, mainly by reducing the pairing correlations. As the temperature increases further, the effects on nuclear structures become pronounced, reducing both the deformations and the shell effects.

• Ključne riječi (engleski): nuclei; finite temperatures
• 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. 109, br. 1, 014318
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.109.014318
• URN:NBN: urn:nbn:hr:217:479766
• Datum objave publikacije: 2024
• 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; Naziv (engleski): Implementation of top research within the Scientific Center of Excellence for Quantum and Complex Systems, and Representations of Lie Algebras; Kratica: QuantiXLie; Voditelj: Hrvoje Buljan; Pravna nadležnost: eu; Financijer: Europska komisija; Linija financiranja: European Regional Development Fund
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevC.109.014318
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2024 American Physical Society. Received 17 September 2023. Revised 10 November 2023. Accepted 8 December 2023. Published 16 January 2024.
• Datum i vrijeme pohrane: 2024-07-31 07:56:15