GENERALIZED OSCILLATOR-STRENGTHS FOR SF6 IN THE S-2P INNER-SHELL REGION

The extrapolation to the optical oscillator strengths (OOSs) of the re cently measured small-angle, theta less than or equal to 10 degrees ge neralized oscillator strengths (GOSs) for SF6 in the S 2p inner-shell region at 1400 eV impact energy has been investigated using various th eoretical approaches. These methods include the recent momentum disper sion formula which has the more reliable larger scattering angle measu rements embedded in it, the universal formula and the Lassettre fittin g formula. From the comparison between the measurements and the univer sal formula, it is concluded that dynamic effects are less significant for the T-1u(a(1g)) state for theta less than or equal to 8 degrees, but are important for the T-1u(t(2g)) and T-1u(e(g)) states. We furthe r conclude that the extrapolated OOSs depend sensitively upon the meth od of extrapolation. The momentum dispersion method produces extrapola ted OOS values that are consistent with those of the experiment, there by manifesting the importance of the accuracy of the larger scattering angle measurements in the extrapolation.