The Diode Laser Spectrum of Iodine Fluoride (IF)in the Ground Electronic State

Abstract

Abstract The infrared absorption spectrum of the gas phase IF molecule in its ground state has been observed for the first time, using a diode laser spectrometer. The wavenumbers of transitions in the v = 1←0, and v = 2 ←1 bands have been measured with a nominal accuracy of +0.001 cm-1. These data were fitted along with the recently published microwave spectrum to produce an improved set Dunham T-parameters. Also the coefficients of the Dunham potential function for the electronic state of IF were determined by a direct fit to the experimental data.