The intermolecular interaction potential, taken as the sum of pair potentials which, in turn, were modeled by the Lennard-Jones potential has been determined by means of nonlinear least squares fitting its parameters to the experimental data on the lines broadening (γ) and shift (δ) coefficients. The data on γ and δ for nine vibration bands ν1, ν3, 2ν2, ν1+ν2, ν2+ν3, 2ν1, ν1+ν3, 2ν2+ν3 and ν1+ν2+ν3 have been obtained from the analysis of the H2O-He absorption spectra, recorded from 3000 to 9000cm-1 with help of IFS 125HR Fourier spectrometer at room temperature, spectral resolution of 0.01cm-1 and in wide pressure range of He. Additionally we use literature data for rotational band (~180GHz) and ν2 band (1850-2140cm-1). The vibrational and rotational dependence of the potential parameters as well as the temperature dependence of the calculated lines broadening coefficients have been demonstrated.
|Журнал||Journal of Quantitative Spectroscopy and Radiative Transfer|
|Состояние||Опубликовано - ноя 2013|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics