Effect of a Gas Medium on Collisional Beats of Polarization of Light in Anisotropic Atomic Collisions under Conditions of Monochromatic Laser Excitation

摘要

An analysis of the dependence of the signal of magnetic beats of circular polarization of light emitted from the 2p_5 state by neon atoms excited by a monochromatic laser pulse on characteristics of a gas medium in the form of inert gases He, Ne, Ar, Kr, and Xe is presented. The anisotropy of the dispersion interaction of an excited Ne atom with unexcited atoms of inert gases was calculated. The values of the dynamic quadrupole moment of the distribution function of relative velocities of colliding particles, which determines the anisotropic collisional formation of orientation of atomic angular momenta from their alignment, were calculated. The study of the polarization beats was shown to be a means for determining the anisotropy of the dispersion interaction of excited Ne atoms with atoms of the surrounding gas medium and the quadrupole moment of the distribution function of their relative velocities.