Naslov
Evolution of octupole deformation and collectivity in neutron-rich lanthanides

Autori
Nomura, K. ; Rodríguez-Guzmán, R. ; Robledo, L. M. ; García-Ramos, J. E. ; Hernández, N. C.

Izvornik
Physical Review C (2469-9985) 104 (2021), 4; 044324, 14

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Nuclear Structure

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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