THE INFLUENCE OF MATTER AND BLACK-BODY RADIATION PHOTONS ON THE DIPOLE POLARIZABILITY-ALPHA AND POLARIZABILITY-GAMMA OF ATOMS

The influence of the surroundings on the linear dipole polarizability alpha and second hyperpolarizability gamma is discussed in terms of th e density rho(M) of isotropically distributed matter as well as the de nsity rho(p) Of thermal black-body radiation photons, alpha and gamma of the rare gas atoms an studied as examples. At standard conditions, both effects are of comparable size for the rare gases. Possible conse quences for ion-molecule reaction rate constants in astronomical envir onments are suggested.