Induzierte Ultrarotabsorption im Spektralgebiet der ersten Oberschwingung von Wasserstoff

Pressure induced absorption has been investigated in mixtures of H₂ with CF₄, SF₆, N₂, CO₂ and N₂O respectively, in the frequency region 8000–9500 cm^?1 of the first overtone of H₂. In mixtures of H₂ with CF₄ or with SF₆ simultaneous vibrational transitions are observed. The absolute intensities of the induced 0→2 vibrational transition of H₂ in the different mixtures and of the simultaneous transitions have been evaluated. Formulas are derived for the absolute intensity of those induced transitions. The induction of the simultaneous transitions is mainly due to the electrostatic interaction in the collision pairs. The contributions of the electrostatic forces and of the overlap forces are of the same order of magnitude in the case of the induced 0→2 vibrational transition of H₂.