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{beta} decay of the 21/2{sup +} isomer in {sup 93}Mo and level structure of {sup 93}Nb

Journal Article · · Physical Review. C, Nuclear Physics
; ; ; ; ;  [1];  [1];  [2];  [3];  [4]; ;  [5]
  1. Department of Physics, Osaka University, Osaka 560-0043 (Japan)
  2. Japan
  3. Research Center for Nuclear Physics (RCNP), Osaka University, Osaka 567-0047 (Japan)
  4. Center for Nuclear Study (CNS), University of Tokyo, Saitama 351-0198 (Japan)
  5. RIKEN, Saitama 351-0198 (Japan)
+ Show Author Affiliations
The {gamma} rays associated with {beta} decay of the 21/2{sup +} isomer in {sup 93}Mo (E{sub x}=2.425 MeV, T{sub 1/2}=6.85 h) were measured with a selective sensitivity to long-lived isomer decays. A new 1262-keV transition was found in the {gamma}-{gamma} coincidence measurement, and it was attributed to a transition in {sup 93}Nb, which is the daughter nucleus of the {beta} decay of the {sup 93}Mo isomer, from the 2.753- to the 1.491-MeV levels. Accurate {gamma}-ray intensity balances have determined the {beta}-decay intensity from the {sup 93}Mo isomer to the 2.753-MeV level in {sup 93}Nb and placed no appreciable intensity for the previously reported {beta}-decay branching to the 2.180-MeV level, for which a recent in-beam {gamma}-ray experiment assigned to be I{sup {pi}} = 17/2{sup -}. Based on the {gamma}-ray intensities from the 2.753-MeV level, spin-parity assignment of this level was revised from 21/2{sup +} to 19/2{sup +}. The observed {beta}-decay intensity and the spin-parity assignment were explained by the jj-coupling shell model calculations.
OSTI ID:
21293817
Journal Information:
Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
Country of Publication:
United States
Language:
English

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALLOCATIONS
BEAMS
BETA DECAY
BRANCHING RATIO
COUPLING
ENERGY-LEVEL TRANSITIONS
GAMMA RADIATION
ISOMERS
KEV RANGE
MEV RANGE 01-10
MOLYBDENUM 93
NIOBIUM 93
PARITY
SENSITIVITY
SHELL MODELS
SPIN