Spin-orbit interaction in relativistic nuclear structure models

Znanstveni rad - Izvorni znanstveni rad

• Autor: Jean-Paul Ebran
• Autor: A Mutchler
• Autor: Elias Khan
• Autor: Dario Vretenar; MBZ: 9570
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Relativistic self-consistent mean-field (SCMF) models naturally account for the coupling of the nucleon spin to its orbital motion, whereas nonrelativistic SCMF methods necessitate a phenomenological ansatz for the effective spin-orbit potential. Recent experimental studies aim to explore the isospin properties of the effective spin-orbit interaction in nuclei. SCMF models are very useful in the interpretation of the corresponding data ; however, standard relativistic mean-field and nonrelativistic Hartree-Fock models use effective spin-orbit potentials with different isovector properties, mainly because exchange contributions are not treated explicitly in the former. The impact of exchange terms on the effective spin-orbit potential in relativistic mean-field models is analyzed, and it is shown that it leads to an isovector structure similar to the one used in standard nonrelativistic Hartree-Fock models. Data on the isospin dependence of spin-orbit splittings in spherical nuclei could be used to constrain the isovector-scalar channel of relativistic mean-field models. The reproduction of the empirical kink in the isotope shifts of even Pb nuclei by relativistic effective interactions points to the occurrence of pseudospin symmetry in the single-neutron spectra in these nuclei.

• Ključne riječi (engleski): nuclear self-consistent mean-field models; spin-orbit interaction
• 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. 94, br. 2, 024304
• p-ISSN: 2469-9985
• DOI: https://doi.org/10.1103/PhysRevC.94.024304
• URN:NBN: urn:nbn:hr:217:730811
• Datum objave publikacije: 2016
• URL dokumenta: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.94.024304
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2016 American Physical Society. Received 15 April 2016; revised manuscript received 9 June 2016; published 3 August 2016.
• Datum i vrijeme pohrane: 2020-02-23 18:55:09