Calculation of atomic polarisabilities by finite-difference methods. Part 1.—Static polarisabilities for the helium sequence

Abstract

Multipole polarisabilities to l= 5 have been calculated for the helium isoelectronic sequence. Solution of coupled and uncoupled Hartree-Fock equations has been effected by numerical techniques, thus permitting the geometric approximation for atomic polarisabilities to be closely examined. An extension of an early prediction of Pauling to higher multipoles is noted.