Evolution of octupole deformation and collectivity in neutron-rich lanthanides

Scientific paper - Original scientific paper

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

Abstract (english)

The onset of octupole deformation and its impact on related spectroscopic properties is studied in even-even neutron-rich lanthanide isotopes Xe, Ba, Ce, and Nd with neutron number 86 􏰁 N 􏰁 94. Microscopic input comes from the Hartree-Fock-Bogoliubov approximation with constrains on the axially symmetric quadrupole and octupole operators using the Gogny-D1M interaction. At the mean-field level, reflection asymmetric ground states are predicted for isotopes with neutron number around N = 88. Spectroscopic properties are studied by diagonalizing the interacting boson model Hamiltonian, with the parameters obtained via the mapping of the mean-field potential energy surface onto the expectation value of the Hamiltonian in the s, d, and f boson condensate state. The results obtained for low-energy positive- and negative-parity excitation spectra as well as the electric dipole, quadrupole, and octupole transition probabilities indicate the onset of pronounced octupolarity for Z ≈ 56 and N ≈ 88 nuclei.

• 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. 4, 044324
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.104.044324
• URN:NBN: urn:nbn:hr:217:554197
• Publication: 2021-10-21
• 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: Tenure Track Pilot Programme
• Document URL: https://link.aps.org/doi/10.1103/PhysRevC.104.044324
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2021 American Physical Society. Received 7 June 2021; accepted 4 October 2021; published 21 October 2021.
• Created on: 2024-09-14 17:33:11