@article{10272/20613,
year = {2021},
url = {http://hdl.handle.net/10272/20613},
abstract = {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.},
organization = {This work has been supported by the Tenure Track Pilot
Programme of the Croatian Science Foundation and the École
Polytechnique Fédérale de Lausanne, and the Project TTP2018-07-3554 Exotic Nuclear Structure and Dynamics, with
funds of the Croatian-Swiss Research Programme. The work
of LMR was supported by Spanish Ministry of Economy and
Competitiveness (MINECO) Grant No. PGC2018-094583-
B-I00. The work of JEGR has been partially supported
by the Ministerio de Ciencia e Innovación (Spain) under
projects number PID2019-104002GB-C21, by the Consejería de Economía, Conocimiento, Empresas y Universidad
de la Junta de Andalucía (Spain) under Group FQM-370,
by the European Regional Development Fund (ERDF), ref.
SOMM17/6105/UGR, and by the European Commission,
ref. H2020-INFRAIA-2014-2015 (ENSAR2). Resources supporting this work were provided by the CEAFMC and
the Universidad de Huelva High Performance Computer
(HPC@UHU) funded by ERDF/MINECO project UNHU15CE-284},
publisher = {American Physical Society},
title = {Evolution of octupole deformation and collectivity in neutron-rich lanthanides},
doi = {10.1103/physrevc.104.044324},
author = {Nomura, Kosuke and Rodríguez-Guzmán, Rayner and Robledo, Luis Miguel and García Ramos, José Enrique and Hernández, N. C.},
}