Abstract
The water vapor line broadening and shift coefficients in the ν 1 +ν 2 , ν 2 +ν 3 , ν 1 +ν 3 , 2ν 3 , 2ν 1 , 2ν 2 +ν 3 , and ν 1 +2ν 2 vibrational bands induced by helium pressure were measured using a Bruker IFS 125HR spectrometer. The vibrational bands 2ν 3 and ν 1 +2ν 2 were investigated for the first time. The interaction potential used in the calculations of broadening and shift coefficients was chosen as the sum of pair potentials, which were modeled by the Lennard-Jones (6-12) potentials. The vibrational and rotational contributions to this potential were obtained by use of the intermolecular potential parameters and intramolecular parameters of H 2 O molecule. The calculated values of the broadening and shift coefficients were compared with the experimental data.
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