Pre-equilibrium effects on properties of hot giant dipole resonances

Year: 1993

Authors: Chomaz P., Di Toro M., Smerzi A.

Autors Affiliation: GANIL, B.P. 5027, F-14021 Caen Cedex, France; INFN-Laboratorio Nazionale del Sud, Viale A. Doria, Catania, Italy; Dipartimento di Fisica, Catania, Italy

Abstract: In this article we analyse how the presence of a pre-equilibrium dipole strength can affect the properties of the giant dipole resonance (GDR) built on hot nuclei. We show that a little amount of GDR phonons still excited when the compound nucleus is formed will substantially modify the gamma-decay from the giant resonance region. Also on the basis of microscopic calculations of the reaction dynamics we propose to study the effect of the N over Z ratio in the entrance channel. This analysis could bring independent information on the problem of the GDR disappearing at high excitation energy.

Journal/Review: NUCLEAR PHYSICS. A (PRINT)

Volume: 563 (3)      Pages from: 509  to: 524

KeyWords: Excitation-energy; Collective Motion; Nuclei; Temperature; Dependence
DOI: 10.1016/0375-9474(93)90126-I

Citations: 93
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