Orientation fluctuations and the angular distribution of the giant-dipole-resonance. gamma. rays in hot rotating nuclei

Journal Article · Mon Nov 12 00:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.2527· OSTI ID:5927941

Alhassid, Y; Bush, B ^[1]

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1. Center for Theoretical Physics, Sloane Laboratory, Yale University, New Haven, CT (USA) A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, CT (USA)

A recent macroscopic approach to the giant dipole resonances in hot rotating nuclei is extended to include the angular distributions of the {gamma} 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 {sup 90}Zr and {sup 92}Mo and is the first to reproduce well both the observed giant-dipole-resonance cross sections and the angular anisotropies.

• DOE Contract Number: AC02-76ER03074
• OSTI ID: 5927941
• Journal Information: Physical Review Letters; (USA), Vol. 65:20; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
MOLYBDENUM 92
GIANT RESONANCE
ZIRCONIUM 90
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
CORRELATIONS
CROSS SECTIONS
FLUCTUATIONS
HARMONIC OSCILLATORS
MEV RANGE 10-100
DISTRIBUTION
ELECTRONIC EQUIPMENT
ENERGY RANGE
EQUIPMENT
EVEN-EVEN NUCLEI
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEV RANGE
MOLYBDENUM ISOTOPES
NUCLEI
OSCILLATORS
RADIOISOTOPES
RESONANCE
STABLE ISOTOPES
VARIATIONS
ZIRCONIUM ISOTOPES
653001* - Nuclear Theory- Nuclear Structure
Moments
Spin
& Models