Orhan İçelli

Effective atomic numbers of some vanadium and nickel compounds for total photon interactions using transmission experiments

Abstract Effective atomic numbers of V 2 O 3 ,VO 2 ,VF 3 ,NH 4 VO 3 ,VF 4 ,NiF 2 ,NiCl 2 ,NiF 2 4H 2 O,NiCl 2 6H 2 O,Ni(ClO 4 ) 2 6H 2 O were measured in the X-ray energy range 15.746– 40.930 keV using an Si(Li) detector. The measured values are compared with the theoretical ones calculated using WinXcom.

Measurement of mass attenuation coefficients of some boron compounds and the trommel sieve waste in the energy range 15.746

Abstract Mass attenuation coefficients of some boron compounds ( H 3 BO 3 , Na 2 B 4 O 7 and B3Al2O3) and the trommel sieve waste (TSW) have been measured by using an extremely narrow collimated-beam transmission method in the energy range 15.746– 40.930 keV . The characteristic Kα and Kβ X-rays of Zr, Mo, Ag, In, Sb, Ba and Pr passed through H 3 BO 3 , Na 2 B 4 O 7 , B3Al2O3 and TSW were detected with a high-resolution Si(Li) detector. The measured values are compared with the theoretical ones obtained using the WINXCOM.

Experimental study on ratios of coherent scattering to Compton scattering for elements with atomic numbers 26⩽Z⩽82 in 59.5 keV for 55° and 115°

Abstract Differential cross-sections for coherent and Compton scattering of 59.5 keV γ-rays at the scattering 55° and 115° by Fe, Ni, Cu, Zn, Zr, Nb, Mo, Ag, Sn, Ta, Au and Pb were measured using a Ge(Li) detector. To measure theoretical coherent and Compton scattering differential cross-sections are extracted by interpolating atomic form factors and incoherent scattering functions corresponding to 2.216 and 4.048 A−1 photon momentum transfer. The experimental cross-section ratios are compared with predictions of nonrelativistic and relativistic form factors theories.

Experimental studies on measurements of mass attenuation coefficients of boric acid at different concentration

Abstract Measurements have been made to determine variation of the mass attenuation coefficients of H 3 BO 3 according to percentage increasing concentration of H 3 BO 3 by using an extremely narrow-collimated-beam transmission method in the energy range 15.746–40.930 keV with an X-ray transmission method. The characteristic K α and K β X-rays of the different elements (Zr, Mo, Ag, In, Sb, Ba and Pr) passed through boric acid was detected with a high-resolution Si(Li) detector. Results are presented and discussed in this paper.

Measurement of X-ray transmission factors of some boron compounds

Abstract Measurements have been made to determine X-ray transmission factors of some boron compounds (H 3 BO 3 ,Na 2 B 4 O 7 and B 3 Al 2 O 3 ) by using an extremely narrow-collimated-beam transmission method in the energy range 15.746– 40.930 keV . The characteristic K α and K β X-rays of the different elements (Zr, Mo, Ag, In, Sb, Ba and Pr) passed through boron compounds were detected with a high-resolution Si(Li) detector. Results are presented and discussed in this paper.

Coherent scattering of 59.5 keV γ-rays by 79Au through angles from 45° to 125°

Abstract Differential cross-sections for coherent scattering of 59.5 keV γ-rays for angles ranging from 45° to 125° by Au were measured using a Ge(Li) detector. The results are compared with those of different versions of the form factor theory.

A new method for the determination of molecular scattering differential cross sections in some lanthanide compounds with energy dispersive X-ray fluorescence system

Molecular scattering differential cross sections have been measured for La2O3, CeO2 and Nd2O3, lanthanide compounds at seven angles ranging from 60° to 120° at intervals 10°. The obtained results have been compared with relativistic and non-relativistic theoretical values.

Measurement of coherent plus incoherent scattering differential cross-section of 59.5 keV γ-rays from gold

Abstract Coherent plus incoherent scattering differential cross-sections of 59.5 keV γ -rays of 241Am from Be, Al and Au for angles ranging from 45° to 125° were experimentally measured. The corresponding theoretical differential cross-sections were calculated by means of form factors and incoherent scattering functions. A comparison between the experimentally determined results and the theoretically calculated values can be seen as a good agreement within the experimental errors. Also, these results have been crossed out graphically.

Pressure effect on the Kβ/Kα intensity ratio of Zn

The pressure effect on the Kβ/Kα intensity ratio of Zn is investigated using a high-resolution Si(Li) detector at photon excitation energy of 59.5 keV. Experimental results were compared with various theoretical and experimental values in literature.

Experimental studies on the Kβ/Kα intensity ratio of Zn at different thickness and pressure

Abstract Kβ/Kα intensity ratios of Zn were measured at a photon excitation energy of 59.5 keV using a high-resolution Si(Li) detector for several thickness at different pressure. Present results were compared with theoretical data and other experimental values. The results were in good agreement theoretical values based on Hartree–Fock theory.