SPECTROSCOPY OF MNF - ROTATIONAL ANALYSIS OF THE D5-PI-A5-SIGMA+(0,0) BAND

The (0,0) band of the d5Π-a5Σ+ system of MnF has been studied by laser-induced fluorescence in a supersonic-jet molecular beam apparatus employing a laser vaporization source. A spectrum with a rotational temperature of about 50 K has been recorded at a resolution of 0.1 cm-1 and the rotational lines assigned. Most of the 18 assigned branches are shown to be satellite branches. The spectrum has been reduced using the appropriate Hamiltonian matrices and the previously derived molecular constants for the a5Σ+ state. A set of molecular parameters has been derived for the d5Π state and are interpreted in terms of ⋯8σ2 3π4 9σ1 1δ2 4π2 5π1 leading electron configuration in which the 5π molecular orbital is essentially an Mn(5p) orbital. © 1992.