DIPOLE POLARIZABILITIES AND HYPERPOLARIZABILITIES OF EXCITED VALENCE STATES OF BE

We present predictions for the scalar and tenser components of the lin ear, alpha, and nonlinear, gamma, polarizabilities of the excited vale nce states of Be, 1s(2)2s2p P-3(0), P-1(0), 1S(2)2p(2) P-3 and (1)s(2) 2p(2) D-1. Also reported are results on the previously extensively stu died ground state 1s(2)2s(2) S-1. The all-order variational calculatio ns solved state-specific complex eigenvalue matrix equations and accou nted for valence electron correlation and field-induced mixing effects . The results demonstrate the importance of valence-Rydberg mixing on these properties, even when the valence states are the lowest of their symmetry. For example, whereas for Be 1s (2)2s2p P-3(0), where such m ixing is very small, alpha(0) = 39.33 and gamma(0) = 9.49 X 10(4) a.u. for 1s(2)2p(2) D-1, Which mixes heavily with the 1s(2)2snd Rydberg se ries (especially with 1s(2)2s3d), alpha(0) = 499.73 a.u. and gamma(0) = 0.48 X 10(7) a.u.