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High- K barrier penetration in sup 174 Hf: A challenge to K selection

Journal Article · · Physical Review Letters; (USA)
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  1. Department of Physics, University of Surrey, Guildford (United Kingdom) Niels Bohr Institute, Risoe, DK-4000 Roskilde (Denmark) Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom)
A sensitive study of the decay of the deformation-aligned {ital K}=14, 4-{mu}s isomer in {sup 174}Hf has revealed a multitude of the {ital K}-forbidden branches to the ground-state rotational band and other low-{ital K} bands, in competition with the known decays to high-{ital K} bands. The isomeric transitions have consistently low hindrance factors. These anomalous findings in an axially symmetric deformed nucleus severely test our understanding of the {ital K}-selection rule. The isomeric decay to an {ital I}=12 rotation-aligned state, and its mixing with the {ital I}=12 yrast state, provide a partial explanation.
OSTI ID:
6603826
Journal Information:
Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:4; ISSN PRLTA; ISSN 0031-9007
Country of Publication:
United States
Language:
English