Effective atom-atom potentials for H2O-He and H2O-Ar systems
V.I. Starikov1,2, T.M. Petrova3, A.M. Solodov3, A.A. Solodov3, V.M. Deichuli3,4
1Tomsk State University of Control Systems and Radioelectronics, 634050, 40 Lenina Prospect, Tomsk, Russia
2National Research Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk, 634050, Russia
3V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
4National Research Tomsk State University, 36, Lenin Avenue, Tomsk, 634050, Russia
Keywords: атом-атомный потенциал, HO-He, HO-Ar, уширение линий, atom-atom potential, collisional broadening
Abstract
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%.
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