Abstract
The damping of the giant dipole resonance (GDR) is studied in , , and as a function of temperature . The results show that the coupling of GDR to the and states is responsible for the increase of the GDR width with increasing up to 3 MeV and its saturation at higher . The quantal width, caused by the coupling to excitations, decreases slowly with increasing . An overall agreement is found between the theoretical evaluations and the recent experimental data in heavy-ion fusion reactions and inelastic scattering. At very high a behavior similar to the transition from zero to ordinary sounds is observed.
- Received 3 October 1997
DOI:https://doi.org/10.1103/PhysRevLett.80.4145
©1998 American Physical Society