Correlative multielectron processes in K-shell photoionization of Ca, Ti and V in the energy range of 8-35 keV

Masaki Oura, Hitoshi Yamaoka, Kiyoshi Kawatsura, Katsumi Takahiro, Naoki Takeshima, Yaming Zou, Roger Hutton, Shin Ito, Yohko Awaya, Mititaka Terasawa, Tsuguhisa Sekioka, Takeshi Mukoyama

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Abstract

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.

Original languageEnglish
Pages (from-to)3847-3863
Number of pages17
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume35
Issue number18
DOIs
Publication statusPublished - Sep 28 2002

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Oura, M., Yamaoka, H., Kawatsura, K., Takahiro, K., Takeshima, N., Zou, Y., Hutton, R., Ito, S., Awaya, Y., Terasawa, M., Sekioka, T., & Mukoyama, T. (2002). Correlative multielectron processes in K-shell photoionization of Ca, Ti and V in the energy range of 8-35 keV. Journal of Physics B: Atomic, Molecular and Optical Physics, 35(18), 3847-3863. https://doi.org/10.1088/0953-4075/35/18/305