Laser-induced Fluorescence Excitation Spectrum of NiS in 15500-17200 cm^-1

The laser-induced fluorescence excitation spectrum of jet-cooled NiS molecule has been recorded in the energy range of 15500-17200 cm^-1. Fifteen bands have been assigned as three transition progressions: 15.65³Π₁(v′=0-4)-X³∑₀^- (v"=0), 15.69³Π₁(v′=0-4)-X³∑₀^-(v"=0). Spectroscopic constants for the three newly identified electronically excited states have been determined for the first time. In addition, the lifetimes for most observed vibronic bands have also been measured.