Sum rules and giant resonances in nuclei
Abstract
The formalism of sum rules is developed and employed to investigate various giant resonances in nuclei. Particular emphasis is given to the role of surface effects which are shown to play a crucial role in the propagation of isoscalar as well as isovector collective modes. Sum rules for non-Hermitian operators, in particular for charge exchange reactions, are derived using the formalism of the dynamic polarizability. Several sum rules for investigating magnetic excitations, the structure of the transition density and the role of the nuclear deformation and of temperature on giant resonance are also presented and discussed.
- Publication:
-
Physics Reports
- Pub Date:
- April 1989
- DOI:
- 10.1016/0370-1573(89)90029-X
- Bibcode:
- 1989PhR...175..103L