Premium
A study of the influence of chemical environment on the L i ( i = 1–3) subshell X ‐ray intensity ratios and the L 3 absorption‐edge energy for some compounds of 66 Dy using synchrotron radiation
Author(s) -
Kaur Rajnish,
Kumar Anil,
Czyzycki Mateusz,
Migliori Alessandro,
Karydas Andreas G.,
Puri Sanjiv
Publication year - 2019
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.3002
Subject(s) - photoionization , xanes , atomic physics , absorption (acoustics) , absorption edge , photon energy , metal , atom (system on chip) , chemistry , analytical chemistry (journal) , absorption spectroscopy , spectral line , foil method , intensity (physics) , photon , physics , materials science , ion , ionization , optics , band gap , condensed matter physics , organic chemistry , chromatography , astronomy , computer science , embedded system , composite material
In the present work, the X ‐ray intensity ratios, I Lk / I Lα ( k = l, β, γ 1,5 , γ 2 , 3 , γ 4 ), have been measured for different compounds of 66 Dy, namely, Dy 2 O 3 , Dy 2 (CO 3 ) 3 , Dy 2 (SO 4 ) 3 .8H 2 O, DyI 2 , and the 66 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 of 66 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).