Abstract
The distributions of Gamow-Teller strength in 90, 92, 94Nb have been calculated utilizing the so-called GT force in the random phase approximation. For 90Nb the calculated distribution is in striking agreement with that part of the 90Zr(p, n) excitation function leading to 1 + excitations in 90Nb and qualitative agreement is demonstrated for data from the reactions 92, 94Zr(p, n). Some 25 % of the GT strength is found to lie well below the structureless giant resonance proposed by Ikeda et al. The implications of this result to the β-decay properties of neutron rich nuclei near A = 90 are discussed.
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