Abstract
The Kαsatellite spectra arising from the correlative multielectron processes accompanyingK-shell photoionization of Ca, Ti and V were measured using a broad range crystalspectrometer. Multiconfiguration Dirac–Fock calculations were performed tointerpret the observed x-ray energies and the spectral line shape. The calculationsagree fairly well with the experimental results. The variation of the KαL1 satellite and theKα1,2hhypersatellite intensities was measured as a function ofexcitation energy in the range of 8–35 keV. The KαL1/Kα1,2 intensityratio for each element is already saturated in our energy range, and the asymptotic values of1.58 ± 0.08,1.26 ± 0.06 and0.97 ± 0.05% for Ca, Ti and V were determined. By combining the present results andthe previously measured values for various elements, we have found aZ−3.5 scalinglaw for the KαL1/Kα1,2intensity ratio. The measured Kα1,2h/Kα1,2intensity ratio, for each element, is found to increase smoothly from itsonset and shows a long saturation range extending up to at least 25keV above the threshold for Ti. The evolution of the Kα1,2h/Kα1,2intensity ratio is compared with the analytic Thomas model and with thetheoretical calculation based on the screened hydrogenic model.
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