V. Aylıkcı

Chemical Effect on K Shell X-ray Fluorescence Parameters and Radiative Auger Ratios of Co, Ni, Cu, and Zn Complexes

The production cross-sections, intensity ratios, and radiative Auger intensity ratios of Co, Ni, Cu, and Zn elements in different complexes were measured. The chemical effects on the K shell fluorescence parameters and the radiative Auger intensity ratios of these elements were investigated and the changes in these parameters were interpreted according to the charge transfer process. The samples were excited by 59.5 keV γ-rays from a 241Am annular radioactive source. K X-rays emitted by samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV.

Chemical effect on the K and L shell intensity ratios of Hf compounds

Chemical effects on the Ki/Kj (i=α2, β, β1, β2; j=α, α1, β1), Li/Lα (i=l, β, γ) and Li/Kj (i=l,α, β, γ; j=α1, α2) x-ray intensity ratios for  (Hf) compounds were investigated. The samples were excited by 123.6 keV γ-rays from a 57Co annular radioactive source. K and L x-rays emitted by samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. We observed a chemical effect on the Li/La and Li/Kj x-ray intensity ratios for Hf compounds. However, for the Ki/Kj intensity ratios, dependence on the chemical state of Hf compounds is almost negligible. The experimental values have been compared with the theoretically calculated values of pure Hf.

Investigation of Coster-Kronig Transition Probabilities (L1 ! L2, L1 ! L3, and L2 ! L3) for Hf and Hf Compounds

In this study, the L 1 →L 2 , L 1 →L 3 , and L 2 →L 3 Coster–Kronig (CK) transition probabilities ( f 12 , f 13 , and f 23 ) for Hf compounds were investigated. The samples were excited by 59.5 keV γ-rays from a 241 Am annular radiative source. L X-rays emitted by samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. In addition, it was observed a chemical effect on the CK transition probabilities for Hf compounds. The semi-empirical values of f 12 , f 13 , and f 23 CK transition probabilities have been compared with the semi-empirical, theoretical and experimental data for pure Hf, respectively.

Determination of natural line widths of Kα X-ray lines for some elements in the atomic range 50≤Z≤65 at 59.5 keV

The semi-empirical determination of natural widths of Kα X-ray lines (Kα1 and Kα2) were performed for Sn, Sb, Te, I, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd and Tb. For the semi-empirical determination of the line widths, K shell fluorescence yields of elements were measured. The samples were excited by 59.5 keV γ rays from a 241Am annular radioactive source in order to measure the K shell fluorescence yields. The emitted K X-rays from the samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The measured K shell fluorescence yields were used for the calculation of K shell level widths. Finally, the natural widths of K X-ray lines were determined as the sums of levels which involved in the transition. The obtained values were compared with earlier studies.

The ratios of emission probabilities of Auger electrons for 3d transition elements at 59,5 keV

The ratios of emission probabilities were determined by using the measured K shell X-ray intensity ratio values for elements from Sc to Zn. For the experimental measurements, the samples were excited by 59.5 keV γ rays from a 241Am annular radioactive source. The emitted K X-rays from the samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The ratios of emission probabilities were denoted as uand v which means p(KLX)/p(KLL) and p(KXY)/p(KLL) respectively. The extracted values from the measured intensity ratios and calculated intensity ratios were compared with the earlier studies. It was found that the ratios of emission probabilities that evaluated from the calculated intensity ratios were agree well with the earlier studies except for Zn.

Corrigendum to “Alloying effect on K X-ray intensity ratio and production cross section values of Zn and Cr in Zn–Cr alloys” [Radiat. Phys. Chem. 87 (2013) 6–15]

a Department of Physics, Faculty of Sciences, Karadeniz Technical University, Trabzon 61080, Turkey b Bordj-Bou-Arreridj University Center, Institute of Science and Technology, 34000 Algeria c Ferhat Abbas University, Faculty of Science, Physics Department, Laboratory LESIMS, Setif 19000, Algeria d Department of Physics, Faculty of Arts and Sciences, Mustafa Kemal University, Hatay 31040, Turkey e Department of Metallurgical and Materials Engineering, Faculty of Technology, Mustafa Kemal University, Hatay 31040, Turkey f Department of Energy Systems Engineering, Faculty of Technology, Mustafa Kemal University, Hatay 31040, Turkey

Calculation of K-shell fluorescence yields for low-Z elements

The analytical methods based on X-ray fluorescence are advantageous for practical applications in a variety of fields including atomic physics, X-ray fluorescence surface chemical analysis and medical research and so the accurate fluorescence yields (ωK) are required for these applications. In this contribution we report a new parameters for calculation of K-shell fluorescence yields (ωK) of elements in the range of 11≤Z≤30. The experimental data are interpolated by using the famous analytical function (ωk/(1−ωk))1/q (were q=3, 3.5 and 4) vs Z to deduce the empirical K-shell fluorescence yields. A comparison is made between the results of the procedures followed here and those theoretical and other semi-empirical fluorescence yield values. Reasonable agreement was typically obtained between our result and other works.

Studies on mass attenuation coefficients, effective atomic numbers and electron densities for CoCuAg alloy thin film

The mass attenuation coefficients for the elements Co, Cu and Ag and a thin film of CoCuAg alloy were measured in the energy range 4.029–38.729 keV. Effective atomic numbers and electron densities were calculated by using these coefficients. The energies were obtained by using secondary targets that were irradiated with gamma-ray photons of 241Am. The x-rays were counted by using a Canberra Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The results were compared with theoretical calculated values and fairly good agreement was found between them within an average experimental error. The mass attenuation coefficients, effective atomic numbers and electron densities were plotted versus photon energy.

Determination of K Shell Fluorescence Yields of Hf Compounds at 123.6 keV

The aim of this study was to determine of K shell fluorescence yields (ωK) of Hf compounds. The targets were irradiated with γ‐photons at 123.6 keV from 57Co annular source. The K X‐rays from different targets were dedected using a (Ultra‐LEGe) semiconductor dedector with a resolution of 150 eV at 5.9 keV. The measured K shell fluorescence yields results compare with the literature semi‐emprical prediction that taken from Krause.

Kβ/Kα X‐Ray Transition‐Probability Ratios for 8 Elements in the range 69 ⩽ Z ⩽ 76

Kβ/Kα X‐ray transition‐probabilitiy ratios for 8 elements in the range 69 ⩽ Z ⩽ 76 were measured with an Ultra‐LEGe solid state detector with a resolution of 150 eV at 5.9 keV. The characteristic K X‐rays were produced by a 25 mCi 57Co annular source. Experimental results have been compared with theoretically calculated values and other available experimental results.