Influence of the chemical environment changes on the line shape and intensity ratio values for La, Ce and Pr L lines spectra

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

“…The chemical effects manifest as shifts in the atomic‐shell binding energies (referred to as chemical shift), which, in turn, leads to corresponding shifts in the X ‐ray emission energies and hence may change the corresponding transition probabilities. These chemical effects can be investigated by measuring the X ‐ray intensity ratios from different compounds of a given element employing EDXRF/WDXRF techniques or by measuring the absorption‐edge energy shifts employing XANES/EXAFS techniques or by measuring the shifts in different characteristic X ‐ray peak positions employing WDXRF technique.…”

“…Most of the investigations of the chemical effects on the L X-ray spectra of different elements reported in the literature [12][13][14][15][16][17][18] include measurements of the intensity ratios L k /Lα (k = l, η, β, γ) performed at incident photon energies much higher than the L i (i = 1-3) absorptionedge energies using EDXRF spectrometers. Some authors reported large influence of the chemical effects, [12][13][14][15] whereas others [16] did not observe any significant influence. On the other hand, Kumar et al reported that only the I Lγ4 /I Lα , intensity ratios [17] for 66 Dy and the I Lβ5,7 /I Lα ratios [18] for 80 Hg exhibited dependence on the chemical environment.…”

Determination of Chemical State and External Magnetic Field Effect on the Energy Shifts and X-Ray Intensity Ratios of Yttrium and Its Compounds

“…In this work, peak areas were determined after the K , K 1,3 and K 2,4 areas were separated by fitting the measured spectra with multi-Gaussian function plus polynomial backgrounds using Microcal Orgin 7.5 software program. Details of the experimental set up and data analysis have been reported earlier (Porikli et al, 2011b). Table 6 lists the theoretical values which were calculated by Scofield (Scofield 1974a;Scofield, 1974b).…”

“…Characteristic quantities such as position of line maxima, full widths at half maximum (FWHM), indices of asymmetry and intensity ratio values were determined in the values of external magnetic field 0.6 T and 1.2 T. Several experiments have been performed on the external magnetic field effect on the K shell X-ray emission lines. Commonly, experimental L X-ray intensities are measured using radioisotopes as excitation sources (Han et al, 2010;Porikli, 2011b). They have the advantages of stable intensity and energy and of small sizes, which allow compact and efficient geometry, and they operate without any external power.…”