Rotational dependence of the broadening of lines of the ν2 band of H2O induced by nitrogen pressure

A semiempirical method for calculating the coefficients of broadening of spectral lines of H2O molecules subjected to nitrogen pressure is developed. The method involves different corrections associated with deviations from the Anderson approximation. The parameters of the method are determined from the adjustment of the coefficients of broadening to experimental data, which makes it possible to predict fairly accurately the parameters of the contour of a line whose measurements were not performed. On the basis of numerous calculations in terms of this method, a numerical analysis is made that allows one to conclude that the rotational dependence of the half-widths of the lines is more complex than was previously believed and to reveal the basic trends of this dependence.