Energies and Character of Low-Lying Levels in Nb94

Utilizing the Risø bent crystal spectrometer, 47 transitions have been observed from 54 keV to ≈ 1 MeV from the reaction Nb93(n,γ)Nb94. These transitions determine the following levels in Nb94 (energy in keV, spin-parity in parentheses): G.S. (6+, ≈ 40.7 (3+), 58.724 (4+), 78.675 (7+), 113.404 (5+), 314.64 (5+), ≈ 334 (2+) and 640.5 (5+).

The 315 keV and 641 keV states probably correspond primarily to the J = 3 2 state of the three neutron configuration coupling to the g 9 2 proton configuration. The other six states result primarily from the coupling of the J = 5 2 state of the three neutron configuration and the g 9 2 proton configuration.

Energies of the levels and transition probability ratios are consistent with this interpretation.