Vol. 30, issue 11, article # 5

Starikov V. I., Petrova T. M., Solodov A. M., Solodov A. A., Dеichuli V. M. Effective atom-atom potentials for H2O–He and H2O–Ar systems. // Optika Atmosfery i Okeana. 2017. V. 30. No. 11. P. 933–940. DOI: 10.15372/AOO20171105 [in Russian].
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An atom-atom interaction potential for H2O–A system is proposed in the form which depends on the normal coordinates q of H2O molecule. The vibrational and rotational contributions in this potential are calculated for H2O–He and H2O–Ar systems. It is shown that the excitation of the stretching modes of the vibrations in H2O molecule leads to an increase in the calculated broadening coefficients γ. In the case of broadening by He, γ increases by 15% for the lines with the rotational quantum number Ka = 9 of the lower state in the transition. In the case of broadening by Ar, this increase is 4%.


atom-atom potential, H2O–He, H2O–Ar, collisional broadening


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