Search for anisotropic directional correlations between. gamma. rays and K x rays emitted from /sup 154/Gd
A very sensitive search has been made for an anisotropy between the 1274-keV ..gamma.. ray and K-shell x rays from the internal conversion of the 123-keV transition to the ground state. The asymmetry for the sum of K..cap alpha../sub 1/ and K..cap alpha../sub 2/ x rays was found to be 1.002 +- 0.004. Previous measurements in /sup 169/Tm and /sup 181/Ta showed effects of about 4% and 3%, respectively. Corrections for detector solid angles and perturbations of the correlation by the extranuclear crystalline fields were made. This null result, in an atom whose nuclear excited states are known to be highly deformed, might be explained by the disappearance of the nuclear deformation, to its final-state value of zero, in times short compared to those of the atomic processes resulting in the K-shell x rays.
- Research Organization:
- Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208
- OSTI ID:
- 5798200
- Journal Information:
- Phys. Rev. A; (United States), Vol. 33:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
GADOLINIUM 154
K CONVERSION
ANGULAR DISTRIBUTION
ANISOTROPY
COINCIDENCE METHODS
CORRELATIONS
DETECTION
GAMMA RADIATION
X RADIATION
CONVERSION
COUNTING TECHNIQUES
DECAY
DISTRIBUTION
ELECTROMAGNETIC RADIATION
EVEN-EVEN NUCLEI
GADOLINIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION
IONIZING RADIATIONS
ISOTOPES
NUCLEI
RADIATIONS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
STABLE ISOTOPES
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory
651822 - Nuclear Properties & Reactions
A=150-189
Experimental- Radioactive Decay- (-1987)