Quadrupole and octupole collectivity and cluster structures in neon isotopes
| Autor: | Marević, P., Ebran, J. -P., Khan, E., Nikšić, T., Vretenar, D. |
|---|---|
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys. Rev. C 97, 024334 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.97.024334 |
| Popis: | The lowest positive- and negative-parity bands of $^{20}$Ne and neutron-rich even-even Ne isotopes are investigated using a theoretical framework based on energy density functionals. Starting from a self-consistent relativistic Hartree-Bogoliubov calculation of axially-symmetric and reflection-asymmetric deformation energy surfaces, the collective symmetry-conserving states are built using projection techniques and the generator coordinate method. Overall a good agreement with the experimental excitation energies and transition rates is obtained. In particular, the model provides an accurate description of the excitation spectra and transition probabilities in $^{20}$Ne. The contribution of cluster configurations to the low-energy states is discussed, as well as the transitional character of the ground state. The analysis is extended to $^{22}$Ne and the shape-coexisting isotope $^{24}$Ne, and to the drip-line nuclei $^{32}$Ne and $^{34}$Ne. The role of valence neutrons in the formation of molecular-type bonds between clusters is discussed. Comment: 16 pages, 15 figures, 2 tables, Accepted for Publication in Physical Review C |
| Databáze: | arXiv |
| Externí odkaz: |
|