Finite field configuration interaction calculations on the distance dependence of the hyperpolarizabilities of H2

Abstract
We present the results of finite field full CI calculations of the first three non-vanishing (hyper)polarizabilities of the hydrogen molecule: the dipole-field α11, the quadrupole-(field)2 β211 and the dipole-(field)3 γ1111 polarizability. The internuclear distance is varied from 0·2 to 6·0 a 0; correlation effects on the (hyper)polarizabilities and their derivatives are investigated.