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Title: Diagram, valence-to-core, and hypersatellite Kβ X-ray transitions in metallic chromium

Journal Article · · X-Ray Spectrometry, XRS
DOI: https://doi.org/10.1002/xrs.3019 · OSTI ID:1529495
 [1]; ORCiD logo [1];  [1];  [2];  [2];  [2];  [3];  [4];  [5];  [6];  [7]; ORCiD logo [8];  [4]
  1. Univ. of Fribourg (Switzerland)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
  4. New Univ. of Lisbon (NOVA), Caparica (Portugal)
  5. LIP-Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa (Portugal)
  6. New University of Lisbon (NOVA), Caparica (Portugal); Sorbonne Universités, Paris (France)
  7. Sorbonne Universités, Paris (France)
  8. Univ. of Lisbon (Portugal)

Here, we identify measurements of the Kβ diagram, valence-to-core (VtC), and hypersatellite X-ray spectra induced in metallic Cr by photon single and double K-shell ionization. The experiment was carried out at the Stanford Synchrotron Radiation Lightsource using the seven-crystal Johann-type hard X-ray spectrometer of the beamline 6-2. For the Kβ diagram and VtC transitions, the present study confirms the line shape features observed in previous works, whereas the Khβ hypersatellite transition was found to exhibit a complex spectral line shape and a characteristic low-energy shoulder. The energy shift of the hypersatellite relative to the parent diagram line was deduced from the measurements and compared with the result of extensive multiconfiguration Dirac–Fock (MCDF) calculations. A signifcant agreement between experiment and theory was found. The MCDF calculations were also used to compute the theoretical line shape of the hypersatellite. A satisfactory agreement was obtained between the overall shapes of the experimental and theoretical spectra, but deviations were observed on the low- and high-energy flanks of the hypersatellite line. The discrepancies were explained by chemical effects, which were not considered in the MCDF calculations performed for isolated atoms.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
Swiss National Science Foundation; USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1529495
Journal Information:
X-Ray Spectrometry, XRS, Journal Name: X-Ray Spectrometry, XRS Journal Issue: 5 Vol. 48; ISSN 0049-8246
Country of Publication:
United States
Language:
English

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