From: Bernhard Schwingenheuer (B.Schwingenheuer@mpi-hd.mpg.de)
Date: Fri Jun 20 2003 - 16:34:24 CEST
Dear FLUKA community,
I am using FLUKA for neutron scattering (9.5 MeV) in nitrogen N14.
In USDRAW I try to learn s.th. about the implemented scattering
processes
for ICODE=300.
A few questions come up when I look at the information I get:
1) Is the information stored in the common block RESNUC meaningful at
the
entry USDRAW with ICODE=300 ?
2) for those reactions when NP=2 and the 2 secondaries are neutron +
gamma
I find that the sum of outgoing energies is typically 2 MeV larger
than
the neutron energy before the scattering.
If these are inelastic reactions then I expect to have N14 before and
after the scattering and hence energy should be conserved (averaged
over
many reactions).
3) For thermal neutrons I see some cases with NP=2 and the secondaries
are
neutron + proton!!
The proton energy is always 0.58 MeV (= 13/14 of the Q value of (n,p)
reaction
for N14). Typically there are several of these reactions for a given
beam
particle! One neutron makes several (n,p) reactions???
4) what is the meaning of the RESNUCLEi output if I have only 1 beam
particle,
i.e. "START 1."?
Thanks a lot for your time....
Gruss
Bernhard Schwingenheuer, Max-Planck-Institut Kernphysik
P.O. Box 103980
69029 Heidelberg
Phone: +49 6221 516-614 (Fax:603)
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