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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
gE Ef
/1 ) (
,
For the collided (scattered) component, this group is collapsed applying an appropriate
(proprietary) energy weighting function f(E).
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.