Mean excitation energy, static polarizability, and hyperpolarizability of the spherically confined hydrogen atom

Abstract

Calculations of mean excitation energy, Im, static polarizability, α, and hyperpolarizability, γ, using the variation perturbation procedure are reported for the spherically confined hydrogen atom. The electric response properties α and γ have been found to strongly depend upon the radius of confinement. The hyperpolarizabilty changes sign and becomes negative under strong confinement.