Progress in the study of the γ-decay of the giant dipole resonance in hot nuclei

被引：17
|
作者：
Bracco, A. [1 ]
Camera, F. [1 ]
Wieland, O. [1 ]
Ormand, W. E. [2 ]
机构：
[1] Univ Milan, INFN, Sez Milano, I-20133 Milan, Italy
[2] Lawrence Livermore Natl Lab, Livermore, CA USA
来源：
MODERN PHYSICS LETTERS A | 2007年 / 22卷 / 33期
关键词：
GDR; hot nuclei; statistical model;
D O I：
10.1142/S0217732307024474
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 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 nulceus.
引用
收藏
页码：2479 / 2492
页数：14
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