Effect of configuration mixing on quadrupole and octupole collective states of transitional nuclei

Scientific paper - Original scientific paper

• Author: Kosuke Nomura
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

A model is presented that simultaneously describes shape coexistence and quadrupole and octupole collective excitations within a theoretical framework based on the nuclear density functional theory and the interacting boson model. An optimal interacting-boson Hamiltonian that incorporates the configuration mixing between normal and intruder states, as well as the octupole degrees of freedom, is identified by means of self- consistent mean-field calculations using a universal energy density functional and a pairing interaction, with constraints on the triaxial quadrupole and the axially symmetric quadrupole and octupole shape degrees of freedom. An illustrative application to the transitional nuclei 72Ge, 74Se, 74Kr, and 76Kr shows that the inclusion of the intruder states and the configuration mixing significantly lower the energy levels of the excited 0+ states, and that the predicted low-lying positive-parity states are characterized by the strong admixture of nearly spherical, weakly deformed oblate, and strongly deformed prolate shapes. The low-lying negative-parity states are shown to be dominated by the deformed intruder configurations.

• Keywords (english): quadrupole and octupole collective excitations
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review C
• Numbering: vol. 106, no. 2, 024330
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.106.024330
• URN:NBN: urn:nbn:hr:217:494623
• Publication: 2022
• Project: Number: TTP-2018-07-3554; Title (croatian): Exotic Nuclear Structure and Dynamics; Title (english): Exotic Nuclear Structure and Dynamics; Acronym: ExoNSD; Leader: Kosuke Nomura; Jurisdiction: Croatia; Funding stream: TTP
• Document URL: https://link.aps.org/doi/10.1103/PhysRevC.106.024330
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2022 American Physical Society. Received 30 June 2022; Revised 13 August 2022; Accepted 19 August 2022; Published 26 August 2022.
• Created on: 2023-08-17 10:47:37