Laser-induced fluorescence excitation spectrum of NiS in the wavelength range 450-560 nm has been recorded and analyzed. Thirty-five vibronic transition bands have been observed, 29 of which are reported for the first time. Rotational analyses indicated that the observed bands can be attributable to the [Omega - 0] - X-3 Sigma(-)(0) transitions of (NiS)-Ni-58 ( and (NiS)-Ni-60). Twenty-five bands have been suggested to be grouped into four vibrational progressions. Furthermore, through dispersed fluorescence measurements we directly obtained the energies for the ground-state vibrational levels up to upsilon ''=6 as well as the vibrational frequency and the anharmonicity constant for the ground state of (NiS)-Ni-58. (C) 2010 Elsevier B. V. All rights reserved.