N. Kaya

An LIII (2P3/2) subshell absorption jump ratio and jump factor for bismuth

In this paper, we report on measurement of the first experimental LIII (2P3/2) subshell absorption jump ratio and jump factor value which were derived from new mass attenuation coefficients measured at the upper and lower energy branches of the LIII absorption edge using an energy dispersive x-ray fluorescence (EDXRF) spectrometer for bismuth. The measurements of mass attenuation coefficients, at 36 energies from 10.010 to 17.478 keV, were done in a transmission geometry utilizing the Ki (i = α, α1,2, β, β1,2) and Li (i = α, β, β1,2, γ, γ1, l) x-rays from different secondary source targets excited by the 59.543 keV γ-photons from an 241Am annular source and detected by an ultra-LEGe solid-state detector with a resolution of 0.15 keV at 5.9 keV. The results have been compared with theoretical values.

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 u2009(Hf) compounds were investigated. The samples were excited by 123.6u2009keV 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 150u2009eV at 5.9u2009keV. 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.

Measurements of total atomic attenuation cross sections of Tm, Yb, Lu, Hf, Ta, W, Re and Os Elements at 122keV and 136keV

The aim of this study was to measure the total atomic attenuation cross sections (σt) in eighth elements (69⩽Z⩽76) at 122 keV and 136 keV. The experimental values of the cross sections were determined using the transmission geometry. Measurements have been performed using an annular source (Co‐57) and Ultra‐LEGe solid state detector with a resolution of 150 eV at 5.9 keV. Experimental results have been compared with theoretically calculated values and other available experimental results. Good agreement was observed among the experimental, theoretical and other experimental values.

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.