Dynamic scalar and tensor polarizabilities for the low-lying 21P0 and 23P0 states of Be
Résumé
Static and dynamic scalar α0(ω) and tensor Δα(ω) dipole polarizabilities at real frequencies have been calculated for the two first excited states 2 1P0 and 2 3P0 of Be using the time-dependent gauge-invariant method (TDGI). The results are compared with the previous accurate theoretical data obtained by Themelis and Nicolaides at the static level. The dynamic results proposed here are new and complete our results published previously concerning the 31S and 33S states. In all cases dynamic components are calculated for dipole polarizability up to the first resonances ((latin small letter h with stroke sign) ω = E21P0-21S and (Latin small letter h with stroke sign) ω = E23P0-1D) and ((Latin small leter h with stroke sign) ω = E23P0-3S and (Latin small letter h with stroke sign) ω = E23Po-3D) for the singlet and the triplet states, respectively.