Faculté des sciences

Synchrotron-radiation-based determination of Xe L-subshell Coster-Kronig yields: a reexamination via high-resolution x-ray spectroscopy

Cao, Wei ; Dousse, Jean-Claude ; Hoszowska, Joanna ; Žitnik, M. ; Kavčič, Matjaz ; Bučar, K.

In: Physical Review A, 2010, vol. 81, no. 1, p. 012501

The xenon L-subshell Coster-Kronig (CK) transition yields were revisited via high-resolution measurements of the Lα1,2 (L₃-M4,5) and Lβ₁ (L₂-M₄) x-ray emission lines. The L x-ray spectra were measured employing a Johansson-type curved crystal spectrometer and energy-tunable synchrotron radiation. The CK yields were derived from the relative L x-ray intensity jumps... Plus

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    Summary
    The xenon L-subshell Coster-Kronig (CK) transition yields were revisited via high-resolution measurements of the Lα1,2 (L₃-M4,5) and Lβ₁ (L₂-M₄) x-ray emission lines. The L x-ray spectra were measured employing a Johansson-type curved crystal spectrometer and energy-tunable synchrotron radiation. The CK yields were derived from the relative L x-ray intensity jumps at the L edges by fitting the fluorescence intensities as a function of the photon energy to the L-subshell photoionization cross sections. The latter were obtained from the measured L-edge photoabsorption spectrum. Values of 0.118±0.029, 0.383±0.037, and 0.096±0.016 were found for the f₂₃, f₁₃, and f₁₂ CK yields, respectively. Thanks to high resolution, the L₁ fluorescence yield of 0.059±0.002 was also determined from intensity ratios of the well-resolved Lβ₄ (L₁-M₂) and Lβ₁ (L₂-M₄) lines.