Search results for: A. Gürol

Items from 1 to 15 out of 15 results

article

Experimental K X-ray intensity ratios of some heavy elements

E. Sakar, A. Gurol, A. Bastug

Radiation Physics and Chemistry > 2017 > 131 > C > 105-107

The K X-ray intensity ratios of some elements (Z&$2gt;70) were measured by using an Energy Dispersive X-Ray Fluorescence Spectrometer, which has an intense radioisotope source and an HPGe detector. The experimental results had uncertainties about 4% and were in good agreement with theoretical results of Scofield. In order to obtain more reliable results, the experiments should be carried out with...

article

Studies on mass attenuation coefficient, effective atomic number and electron density of some thermoluminescent dosimetric compounds

P. Önder, A. Turşucu, D. Demir, A. Gürol

Nuclear Inst. and Methods in Physics Research, B > 2012 > 292 > Complete > 1-10

Mass attenuation coefficient, μ _m , effective atomic number, Z _eff , and effective electron density, N _el , were determined experimentally and theoretically for some thermoluminescent dosimetric (TLD) compounds such as MgSO ₄ , CdSO ₄ , Al ₂ O ₃ , Mg ₂ SiO ₄ , ZnSO ₄ , CaSO ₄ , CaF ₂ , NaSO ₄ ,...

article

Nondestructive analysis of the gold quarter liras

C. Çakır, A. Gürol, L. Demir, Y. Şahin

Journal of Radioanalytical and Nuclear Chemistry > 2009 > 279 > 1 > 345-348

In this study, we have prepared seven Au-Cu standards in the concentration range of 18–24 (as carat) for nondestructive control of gold quarter liras. Some calibration curves for quantitative analysis of Au in the gold quarter liras that commercially present in Turkey have been plotted using these standard samples. The characteristic X-rays of Au and Cu emitted from these standard samples and the...

article

Measurements of K X-ray fluorescence cross sections of Fe, Co, and Ni in an external magnetic field

A. Gürol, A. Karabulut, M. Ertuğrul, G. Budak

Journal of Radioanalytical and Nuclear Chemistry > 2009 > 279 > 1 > 171-178

The effects of the external magnetic field has been investigated on the K XRF cross sections of Fe, Co, Ni, and some of their compounds by using an energy dispersive X-ray fluorescence spectrometer. The samples were irradiated by using the γ-rays of 59.537 keV emitted from an ²⁴¹Am radioisotope source of 100 mCi. The samples were prepared from pure foil of Fe, Co, Ni, and some of their compounds....

article

Measurements of the K X-ray intensity ratios by using energy-dispersive X-ray fluorescence spectrometry

A. Gürol

Applied Radiation and Isotopes > 2008 > 66 > 3 > 372-376

K X-ray intensity ratios of some elements have been investigated by using radioisotope excited-energy-dispersive X-ray fluorescence spectrometer. The characteristic X-rays emitted from the samples have been recorded using a Si(Li) detector and they have been fitted to Gaussian functions by using a least-square method. The measured K X-ray intensity ratios have uncertainties of about 5%, and they are...

article

Influence of nickel (II) and chromium (VI) on the laboratory scale rotating biological contactor

B. K. Taşeli, C. F. Gökçay, A. Gürol

Journal of Industrial Microbiology & Biotechnology > 2008 > 35 > 9 > 1033-1039

High concentration of heavy metals is toxic for most microorganisms and cause strict damage in wastewater treatment operations and often a physico-chemical pretreatment prior to biological treatment is considered necessary. However, in this study it has been shown that biological systems can adapt to Ni (II) and Cr (VI) when their concentration is below 10 and 20 mg/L, respectively. The aim of this...

article

Measurements of L XRF fluorescence cross-sections and relative intensity ratios for some elements in the atomic range 72⩽Z⩽92

A. Karabulut, A. Gürol

Nuclear Inst. and Methods in Physics Research, B > 2006 > 244 > 2 > 303-306

We have measured σ _Lℓ , σLα1,2, σ _Lη , σ _Lβ , 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 59.537keV photons emitted from an ²⁴¹ Am radioisotope source with 100mCi activity. These cross-sections also have been calculated theoretically by using atomic parameters...

article

K-shell absorption jump factors for the elements Ag, Cs, Ba and La derived from new mass attenuation coefficient measurements using EDXRF technique

R. Polat, G. Budak, A. Gürol, A. Karabulut, more

Radiation Measurements > 2005 > 39 > 4 > 409-415

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 Ag ₂ O ₃ , CsHCO ₃ , Ba[(OH) ₂ ] and La ₂ O ₃ . The measurements, in the region 25–40keV, were done in a transmission geometry utilizing the Kα...

article

K shell and L subshell and L shell photoeffect cross-sections in the atomic region 40⩽Z⩽52 and 58⩽Z⩽68 at 59.537keV

A. Karabulut, A. Gürol, G. Budak, M. Ertugˇrul

Nuclear Inst. and Methods in Physics Research, B > 2005 > 227 > 4 > 485-489

K and L shell photoeffect cross-sections have been measured by using our earlier measurements (A. Karabulut et al., Nucl. Instr. and Meth. B 152 (1999) 202 and G. Budak et al., Nucl. Instr. and Meth. B 149 (1999) 379) of total atomic photoeffect cross-sections in elements with 40⩽Z⩽52 and 58⩽Z⩽68 at 59.537keV photons. Fairly good agreement between the experimental and calculated values indicates indirectly...

article

Elemental composition of cement Kiln dust, raw material and cement from a coal-fired cement factory using energy dispersive X-ray fluorescence spectroscopy

R. Polat, A. Gürol, G. Budak, A. Karabulut, more

Journal of Quantitative Spectroscopy and Radiative Transfer > 2004 > 83 > 3-4 > 377-385

Cement Kiln dust raw material, and cement samples collected from the coal-fired cement factory of Askale at Erzurum in Turkey were characterized with the standard addition method using energy-dispersive X-ray fluorescence techniques. An annular 100mCi ² ⁴ ¹ Am radioactive source emitting 59.5keV photon and annular 50mCi ⁵ ⁵ Fe radioactive source emitting 5.96keV photon...

article

L subshell fluorescence cross-sections and relative intensity ratios of some elements in the atomic range 72=<Z=<92

A. Gürol, A. Karabulut

Spectrochimica Acta Part B: Atomic Spectroscopy > 2003 > 58 > 8 > 1473-1480

The Lα ₁ _, ₂ , Lγ ₁ , Lγ ₂ _, ₃ _, ₆ _, ₈ , Lγ ₄ _, ₄ _' and Lγ ₅ X-ray fluorescence cross-sections for some elements in the atomic range 72=<Z=<92 were measured at 59.54 keV. L subshell fluorescence cross-sections (σ _L ₁ , σ _L ₂ and σ _L ₃ ) and relative intensity ratios (σ ...

article

L-subshell and total L-shell photoeffect cross-sections measurements for Pb, Au, W, and Ta at 59.5keV

A. Gürol, A. Karabulut, R. Polat, G. Budak, more

Radiation Physics and Chemistry > 2003 > 66 > 3 > 197-205

L-subshell and total L-shell photoeffect cross-sections were experimentally determined at 59.5keV 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.

article

The qualitative and quantitative analysis of Sarıkamış ore by energy dispersive X-ray fluorescence

N. Ekinci, A. Gürol, R. Polat, G. Budak, more

Journal of Radioanalytical and Nuclear Chemistry > 2003 > 258 > 1 > 163-165

The aim of this study was to determine the concentration of trace elements present in Sarıkamış ore by the standard addition method. The elements determined were Ca, Ti, Fe, Sr, Ba. The equipment used for this study was a Si(Li)-detector, a multichannel analyzer and ⁵⁵Fe and ²⁴¹Am radioisotope sources. The physical basis of the analytical method used, the procedure of sample preparation and the results...

article

K shell fluorescence yields for elements with 33=<Z=<53 using 59.5keV photons

Ö. Şimşek, M. Ertugrul, D. Karagöz, G. Budak, more

Radiation Physics and Chemistry > 2002 > 65 > 1 > 27-31

K shell fluorescence yields for As, Se, Br, Rb, Sr, Zr, Nb, Mo Ru, Pd, Ag, Cd, In, Sn, Sb, Te and I are reported. The experimental values of the fluorescence yields were determined by measuring K X-ray fluorescence and incoherent scattered γ-ray spectrum induced by 59.5keV photons employing a Ge(Li) detector system in a reflection geometry set-up. For measuring the K shell fluorescence yield, the...

article

EDXRF analysis of murgul pyrite ore concentrates

A. Karabulut, G. Budak, R. Polat, A. Gürol, more

Journal of Quantitative Spectroscopy and Radiative Transfer > 2002 > 72 > 5 > 741-746

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 ² ⁴ ¹ 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.

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Keywords

INTENSITY RATIO (4)
RADIOISOTOPE (3)
EDXRF (2)
FLUORESCENCE CROSS-SECTION (2)
X-RAY FLUORESCENCE (2)
XRF (2)
BIOLOGICAL TREATMENT (1)
CEMENT INDUSTRY (1)
CHEMICAL OXYGEN DEMAND (1)
CHROMIUM (VI) (1)
EFFECTIVE ATOMIC NUMBER (1)
EFFECTIVE ELECTRON DENSITY (1)
ELEMENTAL ANALYSIS (1)
EMISSION RATES (1)
ENERGY DISPERSIVE X-RAY FLUORESCENCE (1)
ENVIRONMENT POLLUTION (1)
GEOLOGICAL SAMPLE ANALYSIS (1)
HPGE DETECTOR (1)
MAJOR-MINOR AND TRACE ELEMENT ANALYSIS (1)
MASS ATTENUATION COEFFICIENT (1)
NICKEL (II) (1)
ORES CONCENTRATION (1)
PHOTOEFFECT CROSS-SECTIONS (1)
PYRITE ORE (1)
ROTATING BIOLOGICAL CONTACTORS (1)
SI(LI) DETECTOR (1)
SOURCE INTENSITY (1)
THE METHOD OF MULTIPLE STANDARD ADDITION (1)
TRACE ELEMENT ANALYSIS (1)
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