The problem of the damping of the Giant Dipole Resonance (GDR) at finite temperature at T>2 MeV is discussed here. The experimental results are based on fusion evaporation reactions. The most recent results on the mass region A = 132 (Ce isotopes) obtained in exclusive measurements are compared with the existing results on the A = 110–120 region (Sn isotopes). The comparison with the theoretical predictions based on thermal shape fluctuations is also discussed. The GDR width is found to increase also in the region T>2 MeV and this is accounted by the combined effect of the increase of the compound nucleus width (smaller lifetime) and to the increase of the average deformation of the nucleus.
|Titolo:||Progress in the study of the gamma-decay of the giant dipole resonance in hot nuclei|
|Autori interni:||CAMERA, FRANCO (Secondo)|
BRACCO, ANGELA (Primo)
|Parole Chiave:||GDR ; hot nuclei ; statistical model.|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
Settore FIS/04 - Fisica Nucleare e Subnucleare
|Data di pubblicazione:||2007|
|Digital Object Identifier (DOI):||10.1142/S0217732307024474|
|Appare nelle tipologie:||01 - Articolo su periodico|
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