Fluorescence spectra of the NaI molecule

Abstract

The fluorescence excitation spectrum and fluorescence emission spectra of sodium iodide vapor are reported for the first time. The emission spectrum contains a v\ = 0 progression and v\ = 1 progression of a transition of the NaI molecule, as well as many other bands due to other species. The spectrum is taken from a seeded hypersonic nozzle beam excited by a tunable laser. A vibrational analysis is given, part of the upper state potential is constructed, and the results are related to photodissociation studies.