Electronic absorption spectroscopy of molecular ions in plasmas by dye laser velocity modulation: The <i>A</i>←<i>X</i> system of N+2

Abstract

A computer controlled velocity modulation dye laser spectrometer is used to measure the A 2Πu←X 2Σ+g (7,3) band of N+2. The Doppler-limited absorption spectra are fit to a model Hamiltonian to obtain precise parameters for the states. The ion rotational temperature was determined to be 461±11, and the translational temperature was estimated to be near 1200 K.