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Title: Fermi nuclear matrix element of allowed isospin-hindered positron decay of Co56
Authors: Saw, E.L. 
Yap, C.T. 
Issue Date: 1988
Citation: Saw, E.L., Yap, C.T. (1988). Fermi nuclear matrix element of allowed isospin-hindered positron decay of Co56. Physical Review C 37 (4) : 1672-1674. ScholarBank@NUS Repository.
Abstract: The experimental measurement of the asymmetry parameter of the + decay from the 4+ ground state of Co56 to the 2.085 MeV 4+ state of Fe56 not only yields a value for the Fermi nuclear matrix element MF, but also has significant Fermi-Gamow-Teller mixing and is of interest for a time-reversal invariance test of the weak interaction. To date, nine such measurements have been made and the values of the MF fall into two groups: MF10-5 and MF(35)×10-4. Our theoretical calculation using the Nilsson model and a one-body spheroidal Coulomb potential yields MF=2.3×10-4 for =0.1 and MF=6×10-4 for =0.2, which are in reasonable agreement with the experimental values of MF(35)×10-4. © 1988 The American Physical Society.
Source Title: Physical Review C
ISSN: 05562813
DOI: 10.1103/PhysRevC.37.1672
Appears in Collections:Staff Publications

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