ORIENTATION FLUCTUATIONS AND THE ANGULAR-DISTRIBUTION OF THE GIANT-DIPOLE-RESONANCE GAMMA-RAYS IN HOT ROTATING NUCLEI

被引：78

作者：

ALHASSID, Y ^{[1
]}

BUSH, B ^{[1
]}

机构：

[1] YALE UNIV,AW WRIGHT NUCL STRUCT LAB,NEW HAVEN,CT 06520

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.65.2527

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A recent macroscopic approach to the giant dipole resonances in hot rotating nuclei is extended to include the angular distributions of the rays emitted in the resonance decay. It provides a uniform description of thermal fluctuations in all quadrupole shape degrees of freedom within the framework of the Landau theory. In particular, the inclusion of fluctuations in the nuclear orientation with respect to the rotation axis is crucial in reproducing the observed attenuation of the angular anisotropy. The theory is applied to recent precision measurements in Zr90 and Mo92 and is the first to reproduce well both the observed giant-dipole-resonance cross sections and the angular anisotropies. © 1990 The American Physical Society.

引用

页码：2527 / 2530

页数：4

共 19 条

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