3-BODY EFFECT - NONRELATIVISTIC 1 RHO(5) POLARIZATION TERM IN THE EFFECTIVE POTENTIAL BETWEEN CHARGED-PARTICLES/

It is well known that the effective potential describing the interacti on of a charged particle with a charged or neutral system at large dis tances, but in the nonretardation region, is given by the sum of the C oulomb term, if the net charge of the system is not zero, a static dip ole polarization potential - a/2 rho(4), a term similar to 1/rho(6) pl us higher-order terms. In the retardation region a term similar to 1/r ho(5) appears which is a correction to the static dipole polarization potential. It is shown here within the three-body approach that the dy namic polarization of the bound state through the continuum causes a l ong-range nonretardated term similar to 1/rho(5) which can also be con sidered as a correction to the static dipole polarization potential an d which exists in the nonretardation region.