Laser-Induced Fluorescence of the B2Σ+-X2Π System of OH: Molecular Constants for B2Σ+ (v = 0, 1) and X2Π (v = 7-9, 11-13)

Abstract

The spectroscopy of OH is examined using laser-induced fluorescence in the B2Σ+-X2Π electronic system. Line positions in the (0, 7), (0, 8), (0, 9), (0, 11), (0, 13), and (1, 9) vibration bands are measured. The data on v″ = 11 and 13 are the first experimental measurements on these high-lying ground state levels. Molecular parameters are extracted for X2Π(v = 7-9, 11-13) and B2Σ+ (v = 0, 1) from a global fit to all the data. A table of term values is presented for X2Π (v = 11-13) and B2Σ+(v = 0, 1). The relevance of these measurements to spacecraft glow is discussed.