Abstract
The nuclear giant dipole resonance is discussed using a macroscopic model with two new features. The motion is treated as a combination of the usual Goldhaber-Teller displacement mode and the Steinwedel-Jensen acoustic mode, and the restoring forces are all calculated using the droplet model. The dependence of the resonance energies is well reproduced without any adjustable parameters, and the actual magnitude of the energies serves to fix the value of the effective mass used in the theory. The giant dipole resonance is found to contain a large component of the Goldhaber-Teller type of motion, with the Steinwedel-Jensen mode becoming comparable for heavy nuclei. The width of the giant dipole resonance is estimated on the basis of an expression for one-body damping.
NUCLEAR REACTIONS Semiclassical theory, nuclear giant dipole resonance, calculated , . Droplet model restoring forces. Coupled modes.
- Received 7 December 1976
DOI:https://doi.org/10.1103/PhysRevC.15.2032
©1977 American Physical Society