Vibrational predissociation in the H–F stretching mode of HF–DF

Abstract
The high-resolution infrared spectrum of the K=1–0 subband of the H–F stretching vibrational band of the hydrogen-bonded HF–DF complex has been recorded using a molecular-beam electric resonance optothermal color-center-laser spectrometer. The spectrum exhibits minor perturbations and vibrational predissociation linewidths of 23±2 MHz full width at half-maximum for comparison to the 11±1 MHz widths found for the corresponding mode of the homonuclear HF–HF dimer.