Evolution of octupole deformation and collectivity in neutron-rich lanthanides
Entity
UAM. Departamento de Física TeóricaPublisher
American Physical SocietyDate
2021-10-21Citation
10.1103/PhysRevC.104.044324
Physical Review C 104.4 (2021): 044324
ISSN
2469-9985 (print); 2469-9993 (online)DOI
10.1103/PhysRevC.104.044324Project
Gobierno de España. PGC2018-094583-B-I00Editor's Version
https://doi.org/10.1103/PhysRevC.104.044324Subjects
Bogoliubov Theory; Nuclear Properties; Isotopes; FísicaRights
© 2021 American Physical SocietyAbstract
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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Google Scholar:Nomura, K.
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Rodríguez-Guzmán, R.
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Robledo Martín, Luis Miguel
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García-Ramos, J. E.
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Hernández, N. C.
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