Level structure of {sup 216}At
- Department of Chemistry and Physics, Florida State University, Tallahassee, Florida 32306 (United States)
- Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Batiment 104, 91405 Campus Orsay (France)
The level structure and configurations of {sup 216}At have been studied by observing the alpha decay of {sup 220}Fr, which is in secular equilibrium with {sup 224}Ac. Six of the 16 observed states are tentatively assigned to the configuration {pi}({ital h}{sub 9/2}){sup 3}{upsilon}({ital g}{sub 9/2}){sup 5}, and four to the mixed configuration {pi}({ital h}{sub 9/2}){sup 3}{upsilon}({ital g}{sub 9/2}){sup 4}({ital i}{sub 11/2})+{pi}({ital h}{sub 9/2}){sup 2}({ital f} {sub 7/2}){upsilon}({ital g}{sub 9/2}){sup 5}. These two configurations in {sup 216}At are compared with the corresponding configurations in {sup 212}Bi and {sup 210}Bi. The shape transitions are traced from the quadrupole-octupole deformed {sup 224}Ac through {sup 220}Fr and {sup 216}At, to {sup 212}Bi, described by the spherical shell model, using the alpha decay sequence beginning with {sup 228}Pa. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 283949
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 53; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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