DEFORMED NUCLEAR COLLECTIVE STATES DESCRIBED IN LABORATORY SYSTEM

Abstract.. Microscopic description of nuclear collective excitations is reviewed in terms of the deformed Quasiparticle Random Phase Approximation (dQRPA). To this purpose a deformed single particle basis with good angular momentum is used. The dQRPA equations for collectice states are formally similar to those given by the spherical formalism. It is shown that electromagnetic BE2-values in even-even deformed nuclei are satisfactorily described for both spherical and deformed nuclei. The generalization to proton-neutron excitations decribing beta decays in deformed nuclei is given in terms of pn-dQRPA. The analysis of the effective axial-vector strength gA evidences shell effects.

Keywords: Deformed Quasiparticle Random Phase Approximation, deformed nuclei, electromagnetic transitions, beta decays.

DOI    10.56082/annalsarsciphyschem.2026.1.13

¹Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului, 077125, Bucharest-Măgurele, Romania
²Academy of Romanian Scientists, 3 Ilfov Street, Bucharest, 050044, sector 5, Romania
E-mail: delion@theory.nipne.ro
This work was supported by a grant of the Ministry of Research, Innovation and Digitization, CNCS- UEFISCDI, project number PN-IV-P1-PCE-2023-0273, within PNCDI IV

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PUBLISHED in

Annals Academy of Romanian Scientists
Series on Physics and Chemistry

Volume 11 no 1, 2026

     
ISSN PRINT 2537-4761
ONLINE ISSN   2559-1061