Shape-phase transitions in odd-mass gamma-soft nuclei with mass A ≈ 130

Znanstveni rad - Izvorni znanstveni rad

• Autor: Kosuke Nomura
• Autor: Tamara Nikšić; MBZ: 234533
• Autor: Dario Vretenar; MBZ: 9570
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Quantum phase transitions between competing equilibrium shapes of nuclei with an odd number of nucleons are explored using a microscopic framework of nuclear energy density functionals and a fermion-boson coupling model. The boson Hamiltonian for the even-even core nucleus, as well as the spherical single-particle energies and occupation probabilities of unpaired nucleons, are completely determined by a constrained self-consistent mean-field calculation for a specific choice of the energy density functional and pairing interaction. Only the strength parameters of the particle-core coupling have to be adjusted to reproduce a few empirical low-energy spectroscopic properties of the corresponding odd-mass system. The model is applied to the odd-A Ba, Xe, La, and Cs isotopes with mass A≈130, for which the corresponding even- even Ba and Xe nuclei present a typical case of γ-soft nuclear potential. The theoretical results reproduce the experimental low-energy excitation spectra and electromagnetic properties, and confirm that a phase transition between nearly spherical and γ-soft nuclear shapes occurs also in the odd-A systems.

• Ključne riječi (engleski): nuclear energy density functional; quantum phase transitions; collective levels
• 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. 96, br. 1, 014304
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.96.014304
• URN:NBN: urn:nbn:hr:217:331848
• Datum objave publikacije: 2017
• Projekt: Šifra: IP-2014-09-9159; Naziv (hrvatski): Struktura i dinamika egzotičnih femto-sustava; Kratica: STRUDEF; Voditelj: Nils Paar; Pravna nadležnost: Hrvatska; Financijer: HRZZ; Linija financiranja: IP
• URL dokumenta: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.96.014304
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2017 American Physical Society. Received 24 April 2017. Published 7 July 2017.
• Datum i vrijeme pohrane: 2020-02-29 17:56:42