Abstract
The InO molecule has been produced in a molecular beam using a laser vaporization source, and its (0,0) band, near 428.2 nm, has been studied by laser-induced fluorescence at sub-Doppler (~0.005 cm-1) resolution. The spectrum is characterized by impressive nuclear magnetic hyperfine structure due to the 11.5 In nucleus. Analysis ofthe rotational and hyper fine structure in the band indicates that the transition is B2Sigma+ (case b beta s) - X2 Sigma+ (case b beta J) in which there is a large hyperfine splitting in the upper state and a predominantly spin-rotation splitting in the lower (ground) state of the molecule. The band origin, nu(0,0), lies at 23332.296 cm-1, and derived constants, in cm-1, for the two v = 0 levels are as follows: (table omitted) Dispersed fluorescence experiments and photographic emission spectroscopy using microwave excitation, hollow cathode and dc arc sources have been employed to obtain vibrational data.
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