Transverse scattering of radiation upon focusing of pump laser beam to line in experiments on X-ray laser

The force matrix of the SO₂ molecule is calculated without using a priori assumptions on the nature of the force field. The calculations are performed using a comparatively new 3N-matrix method based on the experimental frequencies of characteristic normal vibrations of ³²S¹⁶O₂, ³²S¹⁸O₂, and ³⁴S¹⁶O₂ molecules. It is shown that the direction of the chemical bond between chemically bound S and O atoms does not coincide with the direction of the straight line that connects the nuclei of these atoms. The angle between these directions (deviation angle) is determined. In the approximation of harmonic vibrations, the deviation angle is Δ = 1.092°. The effect of the anharmonicity of vibrations on the deviation angle is evaluated.