Comment on 'Simulation of ultra-relativistic electrons and positrons channeling in crystals with MBN Explorer'.
The snapshot model of crystal atoms has been implemented in the Monte Carlo code ChaS (Channeling Simulator) and is being successfully used for simulation of ultrarelativistic particle channeling. The model has been criticized by Sushko et al. (J. Comp. Phys. 252 (2013) 404-418) who claim that it overestimates the mean scattering angle in a single projectile-atom collision. As a matter of fact, the snapshot model and the model suggested by Sushko et al. yield essentially the same value of the mean scattering angle. In contrast to the snapshot model, the model preferred by Sushko et al. does not take into account incoherent scattering of the projectile by crystal electrons. This explains why the two models predict different values of the dechanneling length. The claim that the snapshot model underestimates the dechanneling length is unfounded. In actual fact, this model demonstrates a good agreement with experimental data.
Publisher URL: http://arxiv.org/abs/1802.02529
DOI: arXiv:1802.02529v1
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