Static electric polarizabilities and first hyperpolarizabilities of molecular ions RgH+ (Rg = He, Ne, Ar, Kr, Xe): ab initio study

The dependence of αzz on the atomic number of the Rg atom in RgH+ cations. The plot also shows the data for HX (X = F, Cl, Br, I) (SCF-DHF values) from literature.