open access

https://hdl.handle.net/2115/100318

Impacts of hexadecapole correlations in actinide nuclei

英語

2026-07-27

American Physical Society

Physical Review C

114(1)

The impact of hexadecapole correlations on the low-energy spectroscopic properties of Th, U, and Pu nuclei, within the mass range 232 <= A <= 240, is studied systematically using the mapped sdg-IBM model. Fermionic input is obtained via the quadrupole-hexadecapole constrained Hartree-Fock-Bogoliubov approximation, based on the parametrization D1S of the Gogny energy density functional. The sdg-IBM Hamiltonian parameters are determined by mapping the quadrupole-hexadecapole fermionic mean-field potential-energy surfaces onto the corresponding bosonic surfaces. The low-energy spectra and transition strengths, obtained via the diagonalization of the sdg-IBM Hamiltonian, compare well with the available experimental data. It is shown that the effects of hexadecapole collectivity can be observed in high-spin yrast states with spins J(pi) >= 10(+). The mapped sdg-IBM improves the excitation energies of those states, as compared with the simpler sd-IBM model. The sdg-IBM also improves the description of the E2 transition strengths between high-spin yrast states and predicts strong E4 transitions from nonyrast 4+ states to the 0+ ground state.

学術雑誌論文

Accepted Manuscript

©2026 American Physical Society

2469-9985

2469-9993