Advanced Physics for Brachytherapy 2018

1. I need to be efficient, energy discretization

Remember: Energy discretization is realistic if cross sections do not vary considerably within each group and appropriate f(E) is very important

Acuros (for 192 Ir) uses an adaptive G=37 group cross section set. For the uncollided component all 37 groups are used, with For the collided (scattered) component, this group is collapsed applying an appropriate (proprietary) energy weighting function f(E). g E Ef  = /1 ) (

Acuros uses cross section generated by CEPXS, a multigroup-Legendre cross-section generating code. CEPXS does not include coherent scattering and uses the Klein-Nishina incoherent scattering cross sections.