Browsing by Author "Jackson, K.P."

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    Gamow-Teller Strength from the 76Se(n,p)76As Reaction: Implication for the Double Beta Decay of 76Ge
    (Physical Review C, 1997) Helmer, R.L.; Punyasena, M.A.; Abegg, R.; Alford, W.P.; Celler, A.; El-Kateb, S.; Engle, J.; Frekers, D.; Henderson, R.S.; Jackson, K.P.; Long, S.; Miller, C.A.; Olsen, W.C.; Spicer, B.M.; Trudel, A.; Vetterli, M.C.
    Cross sections have been measured up to 35 MeV excitation for the 76Se(n,p)76As reaction at five laboratory angles between 0� and 15�. The incident neutron energy was 198 MeV. The distribution of Gamow-Teller (GT) strength at excitation energies less than 10 MeV was deduced by carrying out a multipole decomposition of the data. The GT strength below 6 MeV excitation was found to be less than 0.9 units, in qualitative agreement with a quasiparticle random-phase approximation calculation. The present results have been compared with data from the 76Ge(p,n)76As reaction to obtain an estimate of a lower limit for the lifetime of 76Ge for ?? decay. The estimate is in qualitative agreement with the measured lifetime.