A study of the influence of chemical environment on the Li (i = 1–3) subshell X‐ray intensity ratios and the L3 absorption‐edge energy for some compounds of 66Dy using synchrotron radiation. (15th January 2019)

• Record Type: Journal Article
• Authors: Kaur, Rajnish; Kumar, Anil; Czyzycki, Mateusz; Migliori, Alessandro; Karydas, Andreas G.; Puri, Sanjiv
• Is Part Of: X-ray spectrometry. Volume 48:Number 2(2019)
• Page Start: 126
• Page End: 137
• Publication Date: 2019-01-15
• Subjects: X-ray spectroscopy -- Periodicals; 543.62
• DOI: 10.1002/xrs.3002
• Languages: English
• ISSNs: 0049-8246

Abstract

Abstract : In the present work, the X‐ray intensity ratios, I Lk / I Lα ( k = l, β, γ1, 5, γ2, 3, γ4 ), have been measured for different compounds of66 Dy, namely, Dy2 O3, Dy2 (CO3 )3, Dy2 (SO4 )3 .8H2 O, DyI2, and the66 Dy metallic foil by tuning the incident photon energies across its L i ( i = 1–3) absorption‐edge energies covering the region 7.8–10 keV in order to investigate the influence of chemical effects on these intensity ratios in the presence of the many‐body effects, which become significant at photon energies in proximity to the L i absorption‐edge energies. The present measured intensity ratios I Lk / I Lα have been compared with two sets of values calculated using the nonrelativistic Hartree–Fock–Slater model‐based L i ( i = 1–3) subshell photoionization cross sections, the Dirac–Fock model‐based X‐ray emission rates, and two sets of the fluorescence and Coster–Kronig yields. The L 3 absorption‐edge energy of66 Dy in its different compounds and metallic foil has been deduced from the XANES spectra recorded in the present work. The L 3 absorption‐edge energy shifts obtained from these absorption‐edge energies are found to increase linearly with the partial charge on the metal atom (66 Dy).