Abstract

Energy-dispersive L X-ray spectra of uranium and gadolinium were recorded in both singles and coincidence mode and fitted with attention to both detector lineshape and Lorentzian broadening. The relative line intensities in the L, L1, L2 and L3 X-ray series were deduced. These results favour the predictions of the Dirac-Fock model over those of the Dirac-Hartree-Slater model. This conclusion has implications for measurements of quantities such as L subshell ionization cross sections by charged particles, because the interpretation of such measurements relies in part upon a data-base of relative L X-ray line intensities.

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