Re: fluka-discuss 1 MeV neutrons

From: Alberto Fasso' <fasso_at_SLAC.Stanford.EDU>
Date: Mon, 29 Aug 2011 12:43:29 -0700 (PDT)


the distinction between neutron elastic and inelastic interactions
is valid only for neutrons with energies > 20 MeV.
Below that energy, the cross sections only give the probability
that a neutron moves from an energy group to another, independent of
which reaction is responsible for it.
All secondary neutrons below 20 MeV are flagged with icode=300 in
USDRAW entry.


On Mon, 29 Aug 2011, Ercan Pilicer wrote:

> dear Fluka users
> i want to track 1 MeV neutrons in a thin slab of silicon. i attached
> the input and modified routine.
> however i do not see any elastic interaction in silicon. there is no
> icode=100 but icode=300 in USDRAW entry.
> what do i miss?
> thanks in advance
> e.
Received on Tue Aug 30 2011 - 09:11:38 CEST

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