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ABSTRACT: Differential cross-sections for incoherent and coherent scattering of 59.54 keV photons were measured for Cu and Zn targets at scattering angles of 40–135° in a reflection geometry setup with a graded shielding arrangement. The ratio of these cross-sections, which can be determined with higher precision than absolute values, is given. A method was used to determine differential incoherent and coherent scattering cross-sections of elements. This method is based on simultaneous measurement of fluorescence radiation and scattered radiation, thus avoiding problems with measuring source strength and source-to-detector solid angle. The measurements were performed using a point source of Am-241 radioisotope and an Si(Li) detector. The experimental results, which complement earlier results, were compared with the theories of incoherent scattering function and form factor. Copyright © 2004 John Wiley & Sons, Ltd.
X-Ray Spectrometry 02/2004; 33(5):349 - 353. · 1.45 Impact Factor
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ABSTRACT: We determined L subshell photoeffect cross-sections by using Lα, L γ
, and L γ
2,3,6,8
X-ray fluorescence cross-sections and atomic parameters and total L shell photoeffect cross-sections for Hf, Hg, Tl, Bi,
Tl, and U at 59.54 keV. These values were compared with the theoretical values of Scofield and experimental values that exist
in the literature.
The European Physical Journal D 09/2002; 21(1):57-61. · 1.48 Impact Factor
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Instrumentation Science & Technology 10/1999; 27:357-366. · 0.43 Impact Factor
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Applied Spectroscopy Reviews 08/1996; 31(3):321-332. · 3.38 Impact Factor
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Applied Spectroscopy Reviews 08/1996; 31(3):333-345. · 3.38 Impact Factor
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ABSTRACT: Experimental K-shell absorption jump factors are derived from mass attenuation coefficients measured using an energy dispersive X-ray fluorescence (EDXRF) spectrometer and samples in the form of the compounds Ag2O3, CsHCO3, Ba[(OH)2] and La2O3. The measurements, in the region 25–40 keV, were done in a transmission geometry utilizing the Kα and Kβ X-rays from different secondary source targets (Sb, Pr, Nd and Sm) excited by the 59.5 keV γ-photons from an 241Am annular primary source. The present results constitute the first measurement for this combination of energy and elements. Also a good agreement is obtained between the experiment and theory.
Radiation Measurements.
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ABSTRACT: L-subshell and total L-shell photoeffect cross-sections were experimentally determined at using energy dispersive X-ray fluorescence spectrometry for Pb, Au, W, and Ta. The obtained experimental results were compared with theoretical and available experimental values.
Radiation Physics and Chemistry.
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ABSTRACT: Analysis by energy dispersive X-ray fluorescence (EDXRF) spectroscopy of Aşkale, Balkaya and Sütkans coal in Erzurum (Turkey) has been carried out for the determination of their elemental composition, using an annular and 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.
Journal of Quantitative Spectroscopy and Radiative Transfer.
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ABSTRACT: Total atomic attenuation, total atomic photoelectric and total atomic scattering cross sections by measuring the transmission factor has been fairly accurately calculated. K X-ray fluorescence (XRF) spectra were measured for Zr, Nb, Mo, Ag, In, Sn and Te at excitation energy of 59.537 keV using Si (Li) detector coupled to a model computerised multi-channel analyser in a 2π geometry set-up. These measured cross sections were compared with the corresponding theoretical and good agreement was observed between the experimental and theoretical values.
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 149(4):379-382. · 1.21 Impact Factor
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ABSTRACT: Cross sections for total atomic attenuation, total atomic photoelectric and total atomic scattering in nine elements (58⩽Z⩽68) at 59.537 keV are reported. The experimental values of the cross sections were determined by measuring the transmission factor. Measurements have been performed using an Am-241 point source and an Si(Li) solid state detector. 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.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms.
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ABSTRACT: We have measured σLℓ, σLα1,2, σLη, σLβ, σLγ1, σLγ2,3,6,8, σLγ4,4′, σLγ5, σLγTotal XRF cross-sections with a Si (Li) detector for some elements in the atomic range 72 ⩽ Z ⩽ 92. The samples were excited 59.537 keV photons emitted from an 241Am radioisotope source with 100 mCi activity. These cross-sections also have been calculated theoretically by using atomic parameters. Relative intensity ratios of L X-rays have determined by using these cross-sections both experimentally and theoretically. Our experimental relative intensity ratios of L X-rays have compared the experimental values available in the literature.
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 244(2):303-306. · 1.21 Impact Factor
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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.
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 155(4):369-372. · 1.21 Impact Factor
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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 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.
Journal of Quantitative Spectroscopy and Radiative Transfer 72(5):741-746. · 3.19 Impact Factor
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ABSTRACT: In this investigation, the concentration levels of potassium, calcium, iron, nickel and cadmium for three Chrysolina species were measured in the region of Erzurum (Turkey) located at latitude 40°17′ north and longitude 41°17′ east. The concentrations measured by energy dispersive X-ray fluorescence (EDXRF) spectrometry were analysed. Photons of 59.5 keV and 5.9 keV emitted, respectively, by an annular 241Am and 55Fe radioactive source were used to excite the characteristic X-rays of various elements present in the insect samples. These results are presented and discussed in this paper.
Journal of Quantitative Spectroscopy and Radiative Transfer 101(2):195-200. · 3.19 Impact Factor
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ABSTRACT: The Kα and Kβ x-ray fluorescence cross sections have been measured for elements in the range 44<~Z<~68 at an excitation energy of 59.5-keV γ ray from 241Am radioisotope with a Si(Li) detector. A reasonable agreement is found between the present experimental results and the theoretically calculated values based on photoionization cross sections by Scofield using Hartree-Slater and Hartree-Fock central potential theory.
Phys. Rev. A. 60(3).
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ABSTRACT: Cement Kiln dust raw material, and cement samples collected from the coal-fired cement factory of Aşkale at Erzurum in Turkey were characterized with the standard addition method using energy-dispersive X-ray fluorescence techniques. An annular radioactive source emitting photon and annular radioactive source emitting photon were used for excitation. Samples are prepared from powder sifted by a 300-mesh sieve. The characteristic K X-rays of the different elements were detected with a Si (Li) detector. The results are presented and discussed in this paper.
Journal of Quantitative Spectroscopy and Radiative Transfer.
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ABSTRACT: Analysis by energy dispersive X-ray fluorescence (EDXRF) spectroscopy of malachite ore of the Narman region in the city of Erzurum (Turkey) has been carried out for the determination of their elemental composition, using an annular 241Am radioisotope source. The elements Fe, Cu, Sr, Zr, In, Sn, Sb, I and Ba are analyzed. Samples are prepared from powder sifted by a 300 mesh sieve. The characteristic K X-rays of the different elements were detected with a Si(Li) detector. These results are presented and discussed in this paper.
Spectrochimica Acta Part B: Atomic Spectroscopy.
