Evolution of octupole deformation and collectivity in neutron-rich lanthanides
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 symm...
| Authors: | , , , , |
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| Format: | article |
| Publication Date: | 2021 |
| Country: | España |
| Institution: | Universidad Autónoma de Madrid |
| Repository: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Language: | English |
| OAI Identifier: | oai:repositorio.uam.es:10486/705746 |
| Online Access: | http://hdl.handle.net/10486/705746 https://dx.doi.org/10.1103/PhysRevC.104.044324 |
| Access Level: | Open access |
| Keyword: | Bogoliubov Theory Nuclear Properties Isotopes Física |
| Summary: | 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 |
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