Evolution of octupole deformation and collectivity in neutron-rich lanthanides
EntityUAM. Departamento de Física Teórica
PublisherAmerican Physical Society
10.1103/PhysRevC.104.044324Physical Review C 104.4 (2021): 044324
ISSN2469-9985 (print); 2469-9993 (online)
ProjectGobierno de España. PGC2018-094583-B-I00
SubjectsBogoliubov Theory; Nuclear Properties; Isotopes; Física
Rights© 2021 American Physical Society
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
Google Scholar:Nomura, K. - Rodríguez-Guzmán, R. - Robledo Martín, Luis Miguel - García-Ramos, J. E. - Hernández, N. C.
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