Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-05-23
Phys.Rev.C52:2504,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages Email: braghin@ipncls.in2p3.fr
Scientific paper
10.1103/PhysRevC.52.2504
We investigate the role of the effective nucleon-nucleon interaction in the description of giant dipole resonances in hot nuclei. For this purpose we calculate the response function of hot nuclear matter to a small isovector external perturbation using various effective Skyrme interactions. We find that for Skyrme forces with an effective mass close to unity an undamped zero sound mode occurs at zero temperature. This mode gives rise in finite nuclei (calculated via the Steinwedel-Jenssen model) to a resonance whose energy agrees with the observed value. We find that zero sound disappears at a temperature of a few MeV, leaving only a broad peak in the dipole strength. For Skyrme forces with a small value of the effective mass (0.4- 0.5), there is no zero sound at zero temperature but only a weak peak located too high in energy. The strength distribution in this case is nearly independent of temperature and shows small collective effects. The relevance of these results for the saturation of photon multiplicities observed in recent experiments is pointed out.
Abada Abdellatif
Braghin Fabio L.
Vautherin Dominique
No associations
LandOfFree
Isovector response function of hot nuclear matter with Skyrme interactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Isovector response function of hot nuclear matter with Skyrme interactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isovector response function of hot nuclear matter with Skyrme interactions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-617269