MULTIPOLARITIES OF GAMMA-RAYS FROM NB-92,NB-94 AND TC-94,TC-95,TC-97,TC-98

92, 94Nb and 94, 96, 98Tc have been produced by the (p, n) reaction at proton energies on and near the d 5 2 isobaric analog resonance. 95,97Tc have been produced by the (p, γ) reaction below the (p, n) threshold. Internal conversion electrons due to the decay of their excited states were detected on-line with a mini-orange spectrometer which is optimized for the energy range 50 to 500 keV. Gamma rays from these nuclei were detected with a thin Ge(Li) detector. Isomeric-delayed internal conversion electrons and γ-rays were observed, using a nanosecond-pulsed beam. The internal conversion coefficients for 55 transitions in these nuclei have been determined and their multipolarities deduced. The multipolarity of the transitions in these nuclei is predominantly M1. Negative parities have been assigned through use of the d 5 2 isobaric analog resonance enhancements of the population of negative-parity final states. The systematic behavior of the 2-, 3- doublet and of the g 9 2 ⊗ d 5 2 multiplet in these nuclei is discussed. © 1979.