Speaker
Dr
Xiao Xiao Cai
(ESS/DTU)
Description
NCrystal is a Monte Carlo software package that we developed for slow neutron interactions with single- and poly-crystals. Together with the inelastic scattering models in NCrystal, the Bragg diffraction model provides detailed microscopic description of the neutron transport in crystals. We only show the single-crystal capabilities in our newly developed NCrystal Geant4 extension in this presentation.
Bragg diffraction in crystals directly demonstrates the wave property of neutron. The physics of such processes in single-crystal can be described by the Darwin equations. So far, the exact solution of equations is only known in the case for a slab-like geometry. Taking advance of the powerful geometrical navigation capabilities of the open-source simulation toolkit Geant4, our detailed Bragg diffraction model can simulate neutron transport accurately in almost any geometry. We will compare our simulated results in a few cases with well established analytical models.
Primary author
Dr
Xiao Xiao Cai
(ESS/DTU)
Co-author
Dr
Thomas Kittelmann
(European Spallation Source ERIC)
