From: Tang, Alfred (atang@phys.ksu.edu)
Date: Thu May 17 2007 - 21:11:41 CEST
Dear FLUKA experts,
I know that FLUKA has a very good reputation in neutron simulations down
to the thermal neutron regime (<1eV). In the case of complex materials
such as hydrogen rich compounds, my understanding is that the chemical
bindings of the molecules affect neutron transport because of the
rotation and vibration of the molecules. MCNPX deals with chemical
binding below 2eV (epithermal neutron regime) by letting the
S(\alpha,\beta) treatment take over the free atom model. It seems that
FLUKA does not ask for information about the chemical formula of the
molecule nor specify any S(\alpha,\beta) treatment. Shall I assume that
FLUKA also uses a free atom model above 2eV? My real question is "How
does FLUKA simulate neutrons below 2eV?"
Regards,
Alfred
**************************************
Alfred Tang
Physics Department
Kansas State University
13 Cardwell Hall
Manhattan, KS 66506
(785) 532-1699
http://www.phys.ksu.edu/personal/atang
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