INFLUENCE OF THE COMPOUND-NUCLEUS LIFETIME ON THE OBSERVED WIDTH OF HOT GIANT-DIPOLE RESONANCES

被引：49
作者：
CHOMAZ, P
机构：
[1] GANIL, F-14021 Caen Cedex
来源：
PHYSICS LETTERS B | 1995年 / 347卷 / 1-2期
关键词：
D O I：
10.1016/0370-2693(95)00028-J
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We discuss the fact that the total width of the photo-absorbtion peak must contain twice the evaporation width of the hot nucleus. Indeed, the observed gamma-rays are related with transitions between two levels of the compound nucleus which have a width due to the finite lifetime of the system. This novel physical effect must be taken into account in the discussion of the properties of the photo-absorbtion strength. We discuss how it modifies the predicted total width of giant resonances at moderate excitation energy and we stress that it may play a role in the observed suppression of the GDR at high excitation energy.
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页码：1 / 5
页数：5
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