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Phys. Rev. C 64, 064318 (2001) [11 pages]

Low-energy structure of 40S through 40P β decay

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J. A. Winger
Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762-5167

P. F. Mantica
Department of Chemistry and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

R. M. Ronningen
National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

M. A. Caprio
A. W. Wright Nuclear Structure Laboratory and Department of Physics, Yale University, New Haven, Connecticut 06520

Received 4 June 2001; published 20 November 2001

Results from the study of the β decay of 40P, produced in the fragmentation of a 48Ca beam, are presented. The 40P half-life and delayed-neutron emission probability have been measured to be 153±8 ms and 15.8±2.1%, respectively. On the basis of γ-ray singles and γγ coincidence data, 21γ rays have been assigned to the decay. Three γ rays are assigned to excited states in 39S populated in the delayed-neutron branch while a total of 15γ rays were placed in a level scheme for 40S with nine excited states up to 5 MeV. The structure of low-energy states in 40S has been fit using the geometrical collective model that indicates the structure to be consistent with that of an anharmonic oscillator with a soft potential.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.64.064318
DOI:
10.1103/PhysRevC.64.064318
PACS:
21.10.-k, 21.60.Ev, 23.40.-s, 27.40.+z
 
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