|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'503'724
Articles rated: 2609
24 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Effect of large neutron excess on the dipole response in the region of the Giant Dipole Resonance | | F. Catara
; E. G. Lanza
; M. A. Nagarajan
; A. Vitturi
; | | Date: |
17 Jul 1997 | | Journal: | Nucl.Phys. A624 (1997) 449-458 | | Subject: | nucl-th | | Affiliation: | 1 and 4), E. G. Lanza, M. A. Nagarajan and A. Vitturi (Catania, Italy; Legnaro, Italy; Padova, Italy; Sevilla, Spain | | Abstract: | The evolution of the Dipole Response in nuclei with strong neutron excess is studied in the Hartree-Fock plus Random Phase Approximation with Skyrme forces. We find that the neutron excess increases the fragmentation of the isovector Giant Dipole Resonance, while pushing the centroid of the distribution to lower energies beyond the mass dependence predicted by the collective models. The radial separation of proton and neutron densities associated with a large neutron excess leads to non vanishing isoscalar transition densities to the GDR states, which are therefore predicted to be excited also by isoscalar nuclear probes. The evolution of the isoscalar compression dipole mode as a function of the neutron excess is finally studied. We find that the large neutron excess leads to a strong concentration of the strength associated with the isoscalar dipole operator $sum_ir^3_iY_{10}$, that mainly originates from uncorrelated excitations of the neutrons of the skin. | | Source: | arXiv, nucl-th/9707026 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER