Double K-shell photoionization of low-Z atoms and He-like ions

Joanna Hoszowska; A. S. Kheifets; M. Berset; I. Bray; W. Cao; J. C.l. Dousse; K. Fennane; M. Kavčič; Y. Kayser; J. Szlachetko; M. Szlachetko

doi:10.1140/epjst/e2009-00968-9

Double K-shell photoionization of low-Z atoms and He-like ions

Joanna Hoszowska^*, A. S. Kheifets, M. Berset, I. Bray, W. Cao, J. C.l. Dousse, K. Fennane, M. Kavčič, Y. Kayser, J. Szlachetko, M. Szlachetko

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

We report on the investigation of the photon energy dependence of double 1s photoionization of light atoms and compare the cross sections for hollow atom and He-like ion production. Measurements of the Kα hypersatellite x-ray spectra of Mg, Al, and Si were carried out using the Fribourg high-resolution x-ray spectrometer installed at the ID21 and ID26 beam lines at the ESRF. The double-to-single photoionization cross section ratios were derived as a function of the incident photon beam energy and compared to convergent close-coupling (CCC) calculations for He-like ions. The dynamical electron-electron scattering contribution to the DPI cross-sections was found to be more important for neutral atoms than for the He isoelectronic series.

Original language	English
Pages (from-to)	23-27
Number of pages	5
Journal	European Physical Journal: Special Topics
Volume	169
Issue number	1
DOIs	https://doi.org/10.1140/epjst/e2009-00968-9
Publication status	Published - 2009

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title = "Double K-shell photoionization of low-Z atoms and He-like ions",

abstract = "We report on the investigation of the photon energy dependence of double 1s photoionization of light atoms and compare the cross sections for hollow atom and He-like ion production. Measurements of the Kα hypersatellite x-ray spectra of Mg, Al, and Si were carried out using the Fribourg high-resolution x-ray spectrometer installed at the ID21 and ID26 beam lines at the ESRF. The double-to-single photoionization cross section ratios were derived as a function of the incident photon beam energy and compared to convergent close-coupling (CCC) calculations for He-like ions. The dynamical electron-electron scattering contribution to the DPI cross-sections was found to be more important for neutral atoms than for the He isoelectronic series.",

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AU - Hoszowska, Joanna

AU - Kheifets, A. S.

AU - Berset, M.

AU - Bray, I.

AU - Cao, W.

AU - Dousse, J. C.l.

AU - Fennane, K.

AU - Kavčič, M.

AU - Kayser, Y.

AU - Szlachetko, J.

AU - Szlachetko, M.

PY - 2009

Y1 - 2009

N2 - We report on the investigation of the photon energy dependence of double 1s photoionization of light atoms and compare the cross sections for hollow atom and He-like ion production. Measurements of the Kα hypersatellite x-ray spectra of Mg, Al, and Si were carried out using the Fribourg high-resolution x-ray spectrometer installed at the ID21 and ID26 beam lines at the ESRF. The double-to-single photoionization cross section ratios were derived as a function of the incident photon beam energy and compared to convergent close-coupling (CCC) calculations for He-like ions. The dynamical electron-electron scattering contribution to the DPI cross-sections was found to be more important for neutral atoms than for the He isoelectronic series.

AB - We report on the investigation of the photon energy dependence of double 1s photoionization of light atoms and compare the cross sections for hollow atom and He-like ion production. Measurements of the Kα hypersatellite x-ray spectra of Mg, Al, and Si were carried out using the Fribourg high-resolution x-ray spectrometer installed at the ID21 and ID26 beam lines at the ESRF. The double-to-single photoionization cross section ratios were derived as a function of the incident photon beam energy and compared to convergent close-coupling (CCC) calculations for He-like ions. The dynamical electron-electron scattering contribution to the DPI cross-sections was found to be more important for neutral atoms than for the He isoelectronic series.

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SP - 23

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JO - European Physical Journal: Special Topics

JF - European Physical Journal: Special Topics

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ER -

Double K-shell photoionization of low-Z atoms and He-like ions

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