The Spectrum of NiH. Some New Transitions

Two new NiH sub-systems, called 2Δ3/2-X2Δ5/2 and 2Φ7/2-X2Δ5/2, have been analysed. The 2Δ3/2 sub-state belongs probably to the earlier known A2Δ state or B2Δ state. A perturbation in the v" = 1 level of the ground X2Δ5/2 state indicates other nearby low-lying states. The observation of the two rather intense 2Δ3/2-X2Δ5/2 bands is an evidence that the states might be better described by Hund's coupling case (c) than by case (a).