Journal of Applied & Computational Mathematics

Comparison of Geant 4, MCNP Simulation Codes of Studying Attenuation of Gamma rays through Biological Materials with XCOM and Experimental Data

Abstract

Medhat ME, Shirmardi SP and Singh VP

Biological materials (Blood, Bones, and Muscle) at different photon energies (59.5, 81.0, 356.5, 661.6, 1173.2 and 1332.5 keV). Appreciable variations are noted for attenuation coefficients by changing the photon energy and the chemical composition of the samples. The numerical simulations attenuation coefficients were compared with experimental data wherever possible and the XCOM theoretical data. The simulations show that the simulated mass attenuation coefficient values are very close to experimental values better than the other obtained theoretical data base for the same samples. The results indicate that MCNP and Geant4 simulation codes can be applied to estimate mass attenuation for various biological materials at different energies. Monte Carlo method may be employed to make additional calculations on the photon attenuation characteristics of different biological sample for unknown experimental data.