Generalized oscillator strength for the Na 3s-3p transition - art. no. 030703

Generalized oscillator strengths for the Na 3s-3p transition have been inve stigated using the spin-polarized technique of the random phase approximati on with exchange (RPAE) and the Hartree-Fock approximation, focusing our at tention on the position of the minimum. Intershell correlations are found t o influence the position of the minimum significantly, but hardly that of t he maximum. The RPAE calculation predicts the positions of the minimum and maximum at momentum transfer. K values of 1.258 and 1.61 a.u., respectively . The former value is within the range of values K = 1.0-1.67 a.u. extracte d by us from experimental measurements. We recommend a careful experimental search for the position of the minimum around the predicted value for conf irmation.