Bibliographic Details
| Title: |
Beyond-mean-field description of octupolarity in dysprosium isotopes with the Gogny-D1M energy density functional |
| Authors: |
Rodriguez-Guzman, R., Robledo, L. M. |
| Source: |
Phys. Rev. C108, 024301 (2023) |
| Publication Year: |
2023 |
| Collection: |
Nuclear Theory |
| Subject Terms: |
Nuclear Theory |
| More Details: |
The emergence and stability of (static) octupole deformation effects in Dy isotopes from dripline to dripline ($72 \le N \le 142$) is analyzed in this paper using mean-field and beyond-mean-field techniques often used for this purpose. We find static octupole deformations at the Hartree-Fock-Bogoliubov (HFB) level with the Gogny D1M force for $N \approx 134$ isotopes, while nuclei with $N \approx 88$ exhibit reflection-symmetric ground states. It is shown that, given the softness found in the mean-field and parity-projected potential energy surfaces along the octupole direction, neither of these two levels of approximation is suficcient to extract conclusions about the (permanent and/or vibrational) nature of octupole dynamic in Dy isotopes. From the analysis of the collective wave functions as well as the excitation energies of the first negative-parity states and $B(E3)$ strengths, obtained within the framework of a two-dimensional symmetry-conserving generator coordinate method (2D-GCM), it is concluded that the increased octupole collectivity in Dy isotopes with $N \approx 88$ and $N \approx 134$ is a vibrational-like effect that is not directly related to permanent mean-field octupole deformation in the considered nuclei. A pronounced suppression of the $B(E1)$ strengths is predicted for isotopes with $N \approx 82$ and $N \approx 126$. The comparison of results obtained with other parametrizations, show the robustness of the predicted trends with respect to the underlying Gogny energy density functional.
Comment: 13 pages, 7 figures, published in Phys Rev C. arXiv admin note: text overlap with arXiv:2104.08063 |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevC.108.024301 |
| Access URL: |
http://arxiv.org/abs/2308.04784 |
| Accession Number: |
edsarx.2308.04784 |
| Database: |
arXiv |
