Browsing by Author "Gurler O., Oktar C., Yalcin S., Kaynak G."

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    A study on atomic number and energy dependence of coherent scattering coefficients
    (2013-01-01) Gurler O., Oktar C., Yalcin S., Kaynak G.; Gurler, O, Oktar, CH, Yalcin, S, Kaynak, G
    This study presents an analytic formula for calculation of the coherent attenuation coefficients of gamma rays for 100 elements in the energy range from 0.01 to 3 MeV. The analytic formula is based on WinXCOM. Comparisons were made of the analytic coherent attenuation coefficients with the coherent attenuation coefficients calculated with the WinXCOM. The results obtained with the analytic approach agree well with those calculated with the WinXCOM. © 2012 Elsevier Ltd. All rights reserved.
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    Analytical formulas for calculating photoelectric attenuation coefficients
    (2012-12-01) Gurler O., Oktar C., Yalcin S., Kaynak G.; Gurler, O, Oktar, CH, Yalcin, S, Kaynak, G
    Photoelectric absorption is an interaction in which an incoming gamma ray virtually transfers all of its energy to an atomic electron, usually the most tightly bound K-shell electron of an atom. This paper uses the Win XCOM computer code as a reference base. We found analytical photoelectric attenuation coefficients for researchers using the Monte Carlo simulation program for Z [1; 100] and E[10keV; 3MeV]. We define a photoelectric effect operator and coefficient operators and a series for photoelectric absorption. We have calculated two polynomial coefficient operators for use with XCOM for photoelectric absorption. We determined 14 energies and atomic number limits for elements, and we find that they are accurate limits of photoelectric absorption for fitting with XCOM. © 2012 Copyright Taylor and Francis Group, LLC.