Effective atomic numbers and electron densities for some lanthanide oxide compounds using direct method in the energy region of 1 keV - 20 MeV
Abstract
In this paper, the effective atomic numbers (Zeff) and electron densities (Neff) representing interaction of
gamma rays with oxides of lanthanides were studied. The effective atomic numbers for photon energyabsorption (ZPEAeff), photon interaction (ZPIeff), relative to air ZReff, the effective electron densities for
photon energy-absorption (NPEAeff) and photon interaction (NPIeff) were calculated using the values of the
mass attenuation and energy absorption coefficients. In the continuous energy region, agreements and
disagreements were observed between photon interaction and photon energy-absorption for Zeffs and
Neffs of compounds in different energy regions. In addition, absorption edge effects on Zeffs leading more
than a single value of Zeff at a specific energy have been discussed for the given compounds. Comparisons
with experiments wherever possible have been carried out for calculated values of Zeff and Neff
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