Effects of the intermolecular interaction on the depolarized rototranslational Raman spectra of hydrogen

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Abstract
Calculations of the rotational Raman spectra of hydrogen at high gas densities and various temperatures are presented. Both the far wings and the line cores are considered where collisional induction and pressure broadening shape the profiles. The treatment of far wings follows previous calculations which had given encouraging results. In the present work, new components of the collision-induced polarizability have been considered in an attempt to remove the previously observed inconsistencies with existing measurements. The far-wing spectral intensities and the Raman linewidths are computed by using two different intermolecular potentials. It is shown that Raman linewidths are more sensitive to the details of the intermolecular potential than far-wing Raman intensities. Comparison with experimental data does not allow one to determine which of the two potentials is to be preferred over the other.