Octupole correlations in light actinides from the interacting boson model based on the Gogny energy density functional

Scientific paper - Original scientific paper

• Author: Kosuke Nomura
• Author: R. Rodríguez-Guzmán
• Author: Y. M. Humadi
• Author: L. M. Robledo
• Author: J. E. García-Ramos
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The quadrupole-octupole coupling and the related spectroscopic properties have been studied for the even- even light actinides 218–238Ra and 220–240Th. The Hartree-Fock-Bogoliubov approximation, based on the Gogny- D1M energy density functional, has been employed as a microscopic input, i.e., to obtain (axially symmetric) mean-field potential energy surfaces as functions of the quadrupole and octupole deformation parameters. The mean-field potential energy surfaces have been mapped onto the corresponding bosonic potential energy surfaces using the expectation value of the sdf interacting boson model (IBM) Hamiltonian in the boson condensate state. The strength parameters of the sdf IBM Hamiltonian have been determined via this mapping procedure. The diagonalization of the mapped IBM Hamiltonian provides energies for positive- and negative-parity states as well as wave functions which are employed to obtain transitional strengths. The results of the calculations compare well with available data from Coulomb excitation experiments and point towards a pronounced octupole collectivity around 224Ra and 226Th.

• 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 (nuclear physics)
• Numbering: vol. 102, 064326
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.102.064326
• URN:NBN: urn:nbn:hr:217:836999
• Publication: 2020
• 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: http://bib.irb.hr/1100470
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2020 American Physical Society. Received 20 August 2020; accepted 7 December 2020; published 28 December 2020.
• Created on: 2023-04-06 13:53:41