Pressure induced shifts in HCl/HF and HF/HCI systems

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Abstract
As a sequel to a previous theoretical study of pressure induced lineshifts in the spectra of diatomic molecules pressurized by polar gases, some new experimental results became recently available and are reported in this paper. They concern the shifts in the HF(0-2) band due to HCl, and the HCl(0-1) and HCl(0-2) bands due to HF, for which predictions have been previously published. In the present paper, theoretical calculations have been again performed for these systems, starting from a formalism developed by Robert and Bonamy, which improves the Anderson theory. By taking into account, as shown previously, the non commutative character of the intermolecular potential, in the calculation of the differential cross-section, a good quantitative agreement with experiments has been obtained for all the considered cases