R: Scintillator response

From: Stefano Agosteo <agosteo_at_ipmce7.cesnef.polimi.it>
Date: Wed, 13 May 2009 09:21:22 +0200

As far as I know, FLUKA simulations of the response of a BC501A scintillator
are described in:

A. Borio di Tigliole, A. Cesana, R. Dolfini, A. Ferrari, G. L. Raselli, P.
Sala, M. Terrani, FLUKA simulations for low-energy neutron interactions and
experimental validation, NIM A 469 (2001) 347-353.

Regards
Stefano

-----Messaggio originale-----
Da: owner-fluka-discuss_at_mi.infn.it [mailto:owner-fluka-discuss_at_mi.infn.it]
Per conto di Jean-Emmanuel Groetz
Inviato: marted́ 12 maggio 2009 15.09
A: fluka-discuss_at_fluka.org
Oggetto: Scintillator response

Dear Fluka experts,

I would like to calculate the recoil proton energy spectrum in an
organic scintillator, such as BC501-A, NE213 or stilbene after neutron
irradiation (monokinetic beam) between 2 and 15 MeV.

Since the n-p scattering is isotropic in the center of mass system in
this energy range, the energy spectrum of the recoil protons should have
a rectangular shape between 0 and En. Due to edge effects, the spectrum
should have a decreasing slope (without taking into account the
nonlinear light output with energy).

In order to get it, I used the DETECT card to score the energy
deposition in my region of scintillation. But this spectrum showed a
strong peak near the incident energy of neutrons. I can mentioned that
the shape of the spectrum seems to be correct at 70 MeV for example.

Does anybody succeed in this kind of simulation with Fluka ?
Did I misunderstand the results ?

Thanks for your help.
Jean-Emmanuel

-- 
________________________________________________________________
Jean-Emmanuel Groetz
University of Franche-Comte
Laboratoire de Chimie Physique et Rayonnements Alain Chambaudet
UMR CEA E4
16, route de Gray
25030 Besancon Cedex
France
mailto: jegroetz_at_univ-fcomte.fr
phone: +33 3 81 66 65 07
fax: +33 3 81 66 65 22
________________________________________________________________
Received on Wed May 13 2009 - 17:31:59 CEST

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