Effect of a gas medium on collisional beats of polarization of light in anisotropic atomic collisions under conditions of monochromatic laser excitation

An analysis of the dependence of the signal of magnetic beats of circular p olarization 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 d ispersion interaction of an excited Ne atom with unexcited atoms of inert g ases was calculated. The values of the dynamic quadrupole moment of the dis tribution function of relative velocities of colliding particles, which det ermines the anisotropic collisional formation of orientation of atomic angu lar momenta from their alignment, were calculated. The study of the polariz ation beats was shown to be a means for determining the anisotropy of the d ispersion interaction of excited Ne atoms with atoms of the surrounding gas medium and the quadrupole moment of the distribution function of their rel ative velocities.