Methods for introducing vibrational effects in the calculation of electric dipole polarizabilities and hyperpolarizabilities (with reference to H+2)

Three different methods for taking into account nuclear motion while calculating molecular static dipole polarizabilities and hyperpolarizabilities are discussed. Within these methods both the purely variational and the variational-perturbational techniques are used to obtain numerical results for the α zz and γ zzzz polarizability components of the H+ 2 molecular ion in its rovibronic ground state.