High-Resolution FT Spectroscopy of the Violet Transitions in the Nitrogen Molecular Ion N 2 +

Abstract

The Los Alamos Fourier transform spectrometer has been used to study the following four near-ultraviolet transitions of nitrogen molecules in a helium inductively-coupled plasma torch: N 2 +   1NG: B 2 Σ u + − X 2 Σ g + ( 0 − 0 ) and N22PG: C3Πu- B3Πg (0-2, 0-1, 0-0). Molecular constants for the N 2 + band have been determined using combination differences and polynomial fits, and will be compared with published values. These data demonstrate the usefulness of this instrument for molecular spectroscopy.