Author(s)

Volnei Borges, Julio Cesar Fernandes, Bardo Ernest Bodmann, Marco Túllio Vilhena, Bárbara Rodriguez

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In this work, we report on a closed-form formulation for the build-up factor and absorbed energy, in one and two di- mensional Cartesian geometry for photons and electrons, in the Compton energy range. For the one-dimensional case we use the LTSN method, assuming the Klein-Nishina scattering kernel for the determination of the angular radiation intensity for photons. We apply the two-dimensional LTSN nodal solution for the averaged angular radiation evaluation for the two-dimensional case, using the Klein-Nishina kernel for photons and the Compton kernel for electrons. From the angular radiation intensity we construct a closed-form solution for the build-up factor and evaluate the absorbed energy. We present numerical simulations and comparisons against results from the literature.

Build-Up Factor; Compton Energy; Cartesian Geometry; Fokker-Plank Equation

V. Borges, J. Fernandes, B. Bodmann, M. Vilhena and B. Rodriguez, "A Closed-Form Formulation for the Build-Up Factor and Absorbed Energy for Photons and Electrons in the Compton Energy Range in Cartesian Geometry," World Journal of Nuclear Science and Technology, Vol. 2 No. 1, 2012, pp. 23-28. doi: 10.4236/wjnst.2012.21004.