The Kα satellite spectra arising from the correlative multielectron processes accompanying K-shell photoionization of Ca, Ti and V were measured using a broad range crystal spectrometer. Multiconfiguration Dirac-Fock calculations were performed to interpret the observed x-ray energies and the spectral line shape. The calculations agree fairly well with the experimental results. The variation of the KαL1 satellite and the Kα1,2 h hypersatellite intensities was measured as a function of excitation energy in the range of 8-35 keV. The KαL1/Kα1,2 intensity ratio for each element is already saturated in our energy range, and the asymptotic values of 1.58 ± 0.08, 1.26 ± 0.06 and 0.97 ± 0.05% for Ca, Ti and V were determined. By combining the present results and the previously measured values for various elements, we have found a Z-3.5 scaling law for the KαL1/Kα1,2 intensity ratio. The measured Kα1,2 h/Kα1,2 intensity ratio, for each element, is found to increase smoothly from its onset and shows a long saturation range extending up to at least 25 kev above the threshold for Ti. The evolution of the Kα1,2 h/Kα1,2 intensity ratio is compared with the analytic Thomas model and with the theoretical calculation based on the screened hydrogenic model.
|Number of pages||17|
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|Publication status||Published - Sep 28 2002|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics