Relativistic effects for polarizabilities and hyperpolarizabilities of rare gas atoms

The relativistic effects for static polarizabilities a and hyperpolarizabil ities gamma of rare gas atoms (Ne through Rn) are investigated theoreticall y with the third-order Douglas-Kroll method. The results yield interesting trends of relativity in going from Ne to Rn: The relativistic effect decrea ses alpha values of Ne and Ar and increases the values of Kr, Xe, and Rn, a nd it decreases gamma values of Rn slightly and increases the values of oth er rare gas atoms, while the electron correlation effect increases alpha an d gamma of all rare gas atoms.