High resolution, cw laser induced fluorescence study of the <i>A</i> 2Π<i>u</i>–<i>X</i> 2Σ+<i>g</i> system of N+2

Abstract

Laser induced fluorescence detection of the N+2 ion has been accomplished using a single mode, cw dye laser, thereby demonstrating the feasibility of continuous ion monitoring and measurement of ion Doppler profiles. A detailed spectral analysis has been performed for 173 transitions of the 4–0 2Πu↔2Σ+g Meinel band system of N+2 . Molecular constants for both the X and A states are obtained. By combining the present results with earlier optical emission work on other vibrational transitions of the Meinel system, equilibrium molecular constants are obtained.