Y. Şahin

Determination of photon attenuation coefficient, porosity and field capacity of soil by gamma-ray transmission for 60, 356 and 662 keV gamma rays.

Gamma-ray transmission methods have been used accurately for the study of the properties of soil in the agricultural purposes. In this study, photon attenuation coefficient, porosity and field capacity of soil are determined by using gamma-ray transmission method. To this end, the soil sample was collected from Erzurum and a 2 x 2 in NaI (Tl) scintillation detector measured the attenuation of strongly collimated monoenergetic gamma beam through soil sample. The radioactive sources used in the experiment were (241)Am, (133)Ba and (137)Cs. The mass attenuation coefficients of dry soil samples were calculated from the transmission measurements. The soil samples were irrigated by adding known quantities of water and the soil-water properties were examined. It was observed that gamma-ray transmission method for determination of the soil parameters has advantages such as practical, inexpensive, non-destructive and fast analysis.

Measurement of M shell X-ray production cross sections and fluorescence yields for the elements in the atomic range 70 ≤ Z ≤ 92 at 5.96 keV

Total M X-ray cross sections for 12 elements in atomic range 70 ≤ Z ≤ 92 were measured at 5.96 keV Mn K X-ray photon energy. The average M shell fluorescence yields (ωM of these elements have also been observed using the presently measured cross section values and the theoretical M shell photoionisation cross section values.

EDXRF analysis of murgul pyrite ore concentrates

Abstract Murgul pyrite ore from the city of Artvin, Turkey was analysed by means of X-ray fluorescence (XRF) by using the standard addition method. The XRF method with an 241 Am annular source of excitation and a Si(Li) detector is employed The results give useful knowledge about the concentration levels of Fe, Cu, As, Sn, Sb, In and I in Murgul pyrite ore.

Determination of calcium and iodine in gall bladder stone using energy dispersive X-ray fluorescence spectrometry

Abstract Energy dispersive X-ray fluorescence techniques were used to analyze gall bladder stones. Enrichment of Ca and I was observed in the gall bladder stone taken from a patient. The concentration of Ca has been determined with an annular 55 Fe radioactive source and the concentration of I with an annular 241 Am radioactive source using the standard addition method in 2π geometry. A Si(Li)-detector was used to measure Ca and I concentrations in the gall bladder stones.

Measurement of atomic L shell fluorescence (ω1, ω2, ω3) and Auger (a1, a2 and a3) yields for some elements in the atomic number range 59≤Z≤85

Abstract A comprehensive set of theoretical Coster–Kronig and fluorescence yields are presented for atomic numbers 18≤Z≤100. These quantities are based on ab initio relativistic calculations. Agreement with experimental values is fair for ω1 and generally good for ω2, ω3 (Z≥54) [1] . Therefore, atomic L shell fluorescence (ω1, ω2, ω3) and Auger yields (a1, a2 and a3) for some elements in the atomic number range 59≤Z≤85 were determined. These selected measured semi-empirical values were also fitted by least squares to polynomials in the Z of the form ∑nanZn and compared with theoretical and with earlier fitted values.

Kα and Kβ X-ray fluorescence cross-sections in the atomic region 26⩽Z⩽42 excited by 59.5 keV photons

Abstract The Kα and Kβ X-ray fluorescence (XRF) cross-sections were experimentally determined for elements in the range 26⩽ Z ⩽42. The obtained experimental results were in good agreement with the theoretical values.

Chemical effects on Lα/Lβ X-ray intensity ratios of Ba, La and Ce

Chemical effects on the Lα/Lβ X-ray intensity ratio of Ba, La and Ce were investigated. The vacancies in the L shell were created by 59.5 keV γ-rays from an Am-241 radioactive source and the L X-rays were measured using a Si(Li) detector with resolution 160 eV at 5.9 keV. The experimental values are given with the theoretical values of the pure elements.

Kβ/Kα intensity ratios following radioactive decay and photoionization

Kβ/Kα intensity ratios for Cr, Mn, Fe, Cs and Ba have been measured following radioactive decay and photon excitation. A Ge(Li) detector coupled to an ND66B analyzer was used in the measurements. The Kβ/Kα intensity ratio is affected by the mode of excitation. This effect has a significant influence on Kβ/Kα intensity ratios of 3d shell elements (Cr, Mn, Fe). However, the effect was found smaller for Cs and Ba.

Analysis of trace elements in different three region coals in Erzurum (Turkey): a study using EDXRF

Abstract Analysis by energy dispersive X-ray fluorescence (EDXRF) spectroscopy of Askale, Balkaya and Sutkans coal in Erzurum (Turkey) has been carried out for the determination of their elemental composition, using an annular 241 Am and 55 Fe radioisotope source. The characteristic K X-rays of the different elements were detected with Si(Li) and Ge(Li) detectors. The analysis were performed on coal samples and the results were compared.

Measurement of Kα and Kβ X-ray fluorescence cross-sections and the Kβ/Kα intensity ratios for elements in the range 22⩽Z⩽29 by 10 keV photons

Abstract Kα and Kβ X-ray fluorescence cross-sections and the Kβ / Kα intensity ratios were experimentally determined for elements in the range 22⩽ Z ⩽29 by 10 keV photons using secondary excitation method. K X-rays emitted by samples were counted by a Si(Li) detector with resolution 160 eV at 5.9 keV . Obtained values were compared with the calculated values. The experimental values for all the elements were in good agreement with the calculated values.