The pressure-induced rotational absorption spectrum of hydrogen: II

Abstract

A formula is derived for the integrated intensity of pressure-induced rotational transitions in pure gases and gas mixtures at moderate pressures. This formula is applied to the pressure induced rotational spectrum of hydrogen, described in a previous article. A good agreement between the observed and the calculated intensities can be obtained if it is assumed that the induction of the transition moments is mainly caused by the quadrupole field of the hydrogen molecule. In an analogous way, the intensity of the induced simultaneous vibrational-rotational transition in mixtures of carbon monoxide and hydrogen is calculated.