Laser spectroscopy of NiBr: rotational analysis of the 2P3/2-X2P3/2 transition

NiBr was produced in a supersonic free jet expansion in argon by the reaction of laser ablated nickel atom and bromoethane (C2H5Br)(C2H5Br) vapour. High resolution laser induced fluorescence spectra between 724 and 810 nm have been obtained using a c.w. single frequency Ti:sapphire laser. 8 bands have been recorded and 3 were assigned to the 2Π3/2−X2Π3/22Π3/2−X2Π3/2 transition. Transition lines from four isotopic molecules: 58Ni79Br58Ni79Br, 58Ni81Br58Ni81Br, 60Ni79Br60Ni79Br and 60Ni81Br60Ni81Br, are observed and analysed. Least squares fit of measured lines of each isotopic molecule was performed. Molecular constants of all four isotopic molecules will be reported. Acknowledgement: This work was carried out with support from the Hong Kong Research Grants Council