Level structure of {sup 227}Th investigated in the {alpha} decay of {sup 231}U
- Institut fuer Strahlen- und Kernphysik, Universitaet Bonn, Bonn (Germany)
- Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 3BX , United Kingdom; CERN, CH-1211 Geneva 23 (Switzerland)
The level structure of {sup 227}Th has been studied using the {alpha} decay of {sup 231}U. The use of mass-separated {sup 231}U sources and high-resolution {alpha}-particle and {gamma}-ray spectroscopy enabled the identification of 16 excited levels of {sup 227}Th. The angular distribution of {alpha} particles in the decay of low-temperature oriented {sup 227}Th is consistent with a {sup 227}Th ground-state spin of 1/2. The low-lying levels of {sup 227}Th can be interpreted in terms of a K=1/2{sup {plus_minus}} parity doublet and a K=3/2{sup +} band coupled with the 1/2{sup +} member of the parity doublet by the Coriolis interaction. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 496848
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 55; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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