From: Bernhard Schwingenheuer (B.Schwingenheuer@mpi-hd.mpg.de)
Date: Tue May 27 2003 - 12:52:21 CEST
Dear FLUKA physics experts:
recently I have started to use FLUKA for the scattering/absorption of
low
energy neutrons in Nitrogen.
I start with a beam of 9.5 MeV neutrons and at the entry USDRAW I check
the secondary particles for ICODE=300. I see elastic scattering events,
inelastic events (n --> n+gamma) with gamma energies corresponding
to the excitation level of Nitrogen 14 and absorption events.
My question is: In case of absorption I expect a gamma or proton or
alpha to come out but I see not outgoing particle (NP=0). Are (n,gamma)
and (n,p) reactions simulated at all by FLUKA?
I also plotted the energy balance for inelastic events. The sum
of outgoing neutron energy + gamma energy is on average 2 MeV larger
than the incoming neutron energy. What is the reason for this?
For elastic scattering the energy balance is ok, i.e. the energy
loss is on average consistent with the scattering angle.
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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