Overtone emission spectroscopy of HF and DF: Vibrational matrix elements and dipole moment function

Abstract

Measurements of the emission intensities for overtone bands of HF and DF from a chemical laser source have been used to determine the dipole moment function for the ground electronic states of HF and DF for internuclear separations from 1.25–3.1 bohr. Vibrational matrix elements and Einstein coefficients have been determined for the fundamental through fifth overtone bands for all transitions from upper vibrational levels below v=10 for HF and v=13 for DF. The results are compared with recent ab initio and semiempirical dipole moment calculations.