Monte Carlo simulation of coherently scattered photons based on the inverse-sampling technique

In this study, a novel Rayleigh scattering model using anomalous scattering factors based on the inverse-sampling technique is presented. Its performance was evaluated against other simulation algorithms in terms of simulation accuracy and computational efficiency. The computational efficiency was tested with a general-purpose Monte Carlo package named Particle Transport in Media (PTM). The evaluation showed that a Monte Carlo model using both atomic form factors and anomalous scattering factors for the angular distribution of photons (instead of the atomic form factors alone) produced Rayleigh scattering results in closer agreement with experimental data. The comparison and evaluation confirmed that the inverse-sampling technique using atomic form factors and anomalous scattering factors exhibited improved computational efficiency and performed the best in reproducing experimental measurements and related scattering matrix calculations. Furthermore, using this model to sample coherent scattering can provide scientific insight for complex systems.

Source: Acta Crystallographica Section A - December 5, 2019 Category: Chemistry Authors: Muhammad, W. Liang, Y. Hart, G.R. Nartowt, B.J. Deng, J. Tags: Rayleigh scattering Monte Carlo simulation atomic form factors anomalous scattering factors total cross sections differential cross sections research papers Source Type: research