Effective atomic numbers and electron densities for some lanthanide oxide compounds using direct method in the energy region of 1 keV - 20 MeV

Authors : Mehmet Büyükyıldız

Pages : 7-12

Doi:10.17678/beujst.07046

View : 12 | Download : 11

Publication Date : 2016-06-30

Article Type : Research Paper

Abstract :In this paper, the effective atomic numbers and electron densities representing interaction of gamma rays with oxides of lanthanides have been studied. The effective atomic numbers for photon energy-absorption insert ignore into journalissuearticles values( Z PEAeff ); and photon interaction insert ignore into journalissuearticles values( Z PIeff );, and relative to air Z Reff , the effective electron densities for photon energy-absorption insert ignore into journalissuearticles values( N PEAeff ); and photon interaction insert ignore into journalissuearticles values( N PIeff ); were calculated using the values of the mass attenuation and energy absorption coefficients. The variation of Z PEAeff , Z PIeff , Z Reff , N PEAeff and N PIeff with energy were shown graphically. In the continuous energy region, it was observed that there are agreements and disagreements between photon interaction and photon energy-absorption for effective atomic numbers and electron densities of compounds in different energy regions. In addition, absorption edge effects on effective atomic numbers leading more than a single value of effective atomic number at a specific energy have been discussed for the given compounds. Comparisons with experiments wherever possible have been carried out for calculated values of Z eff and N eff .
Keywords : Lanthanides, Effective atomic number, Effective electron density, Radiation interaction