Shell-model calculations of Gamow-Teller strength in [sup 51]V, [sup 54]Fe, and [sup 59]Co

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.48.1677· OSTI ID:6109716

Aufderheide, M B; Bloom, S D; Resler, D A; Mathews, G J ^[1]

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1. Physics Department, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

The Gamow-Teller (GT) strength functions of [sup 51]V, [sup 54]Fe, and [sup 59]Co measured by recent charge-exchange experiments have been studied using shell-model calculations employing two model spaces. The shell model is fairly successful at reproducing GT strength in the ([ital p],[ital n]) direction, but the agreement is not as good in the ([ital n],[ital p]) direction. It is found that both directions can be fit consistently by shifting single particle energies in a systematic manner. It is found that roughly 75% of the sum-rule strength can be seen in the experiments for both [sup 51]V and [sup 54]Fe. It is also found that roughly 35% of the GT strength predicted by the shell model is seen in the ([ital n],[ital p]) direction for all three nuclei, but that the quenching in the ([ital p],[ital n]) direction varies with nucleus. The consequences of these findings for improving the calculation of weak interaction rates are discussed.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6109716
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:4; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BETA DECAY
CHARGE EXCHANGE
CHARGED-PARTICLE REACTIONS
COBALT 59
COBALT ISOTOPES
DECAY
EVEN-EVEN NUCLEI
FUNCTIONS
GAMOW-TELLER RULES
HADRON REACTIONS
INELASTIC SCATTERING
INTERMEDIATE MASS NUCLEI
IRON 54
IRON ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
PROTON REACTIONS
SCATTERING
SHELL MODELS
STABLE ISOTOPES
STRENGTH FUNCTIONS
VANADIUM 51
VANADIUM ISOTOPES