Interplay between pairing and triaxial shape degrees of freedom in Os and Pt nuclei

Scientific paper - Original scientific paper

• Author: Kosuke Nomura
• Author: Dario Vretenar
• Author: Z. P. Li
• Author: J. Xiang
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The effect of coupling between pairing and quadrupole triaxial shape vibrations on the low-energy collective states of γ -soft nuclei is investigated using a model based on the framework of nuclear energy density functionals (EDFs). Employing a constrained self-consistent mean-field (SCMF) method that uses universal EDFs and pairing interactions, potential energy surfaces of characteristic γ -soft Os and Pt nuclei with A ≈ 190 are calculated as functions of the pairing and triaxial quadrupole deformations. Collective spectroscopic properties are computed using a number-nonconserving interacting boson model (IBM) Hamiltonian, with parameters determined by mapping the SCMF energy surface onto the expectation value of the Hamiltonian in the boson condensate state. It is shown that, by simultaneously considering both the shape and pairing collective degrees of freedom, the EDF-based IBM successfully reproduces data on collective structures based on low-energy 0+ states, as well as γ -vibrational bands.

• Keywords (english): nuclear structure
• 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. 104, no. 2, 024323
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.104.024323
• URN:NBN: urn:nbn:hr:217:794815
• Publication: 2021
• 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
• Project: Number: KK.01.1.1.01.0004; Title (english): QuantiXLie Center of Excellence; Acronym: QuantiXLie; Leader: Hrvoje Buljan, Pavle Pandžić; Jurisdiction: eu; Funding stream: European Regional Development Fund - the Competitiveness and Cohesion Operational Programme
• Document URL: https://link.aps.org/doi/10.1103/PhysRevC.104.024323
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2021 American Physical Society. Received 13 June 2021; Accepted 11 August 2021; Published 19 August 2021.
• Created on: 2023-08-10 08:48:08