From: Rollet Sofia (Sofia.Rollet@arcs.ac.at)
Date: Wed Dec 12 2007 - 16:25:09 CET
Dear Denis,
our group in Seibersdorf already did many comparisons between FLUKA and
GEANT codes for thin Si layers.=20
We also found differences between FLUKA and GEANT (up to 60% for photon
sources below 100 keV) using GEANT4 7.1. Using GEANT4 8.3 (and Penelope
physics in it) the agreement is much better.=20
It seems that GEANT changed quite a lot the standard electromagnetic
physics between GEANT4 7.1 and GEANT4 8.3.
Hence, we would strongly advice you to use a more recent version of
GEANT.
(the latest one, GEANT4 9.0 is available at
http://geant4.web.cern.ch/geant4/support/download.shtml)
Best regards,
Sofia Rollet
Sofia Rollet
Radiation Safety and Applications
Risk and Safety
Austrian Research Centers GmbH -ARC
A-2444 Seibersdorf, Austria
=20
Phone: +43 (0)50550 - 2482
Fax: +43 (0)50550 - 2502=20
E-mail: sofia.rollet@arcs.ac.at
Web: http://www.healthphysics.at
-----Original Message-----
From: owner-fluka-discuss@mi.infn.it
[mailto:owner-fluka-discuss@mi.infn.it] On Behalf Of Bertini Dr. Denis
Sent: Friday, December 07, 2007 11:45 AM
To: fluka-discuss@fluka.org
Subject: Energy deposition on thin layer of Silicon
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Dear User,
I am comparing results for Energy deposition in Fluka and Geant3 for
thin layer of Silicon ( typically 400 micrometer ).
I found out that Fluka results ( using USRBIN ) give systematically
20% to 30% lower energy loss in Silicon that Geant3.
I use the recommended algorithm for the energy loss calculation
(apportioning track length algorithm ).
May some specific settings have to be included in my input file
in order to cope with thin layer.=3D20
Any help is welcome !=3D20
thanks in advance.=3D20
Denis Bertini
=3D20
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<P><FONT SIZE=3D3D2>Dear User,<BR>
I am comparing results for Energy deposition in Fluka and Geant3 for<BR>
thin layer of Silicon ( typically 400 micrometer ).<BR>
I found out that Fluka results ( using USRBIN ) give systematically<BR>
20% to 30% lower energy loss in Silicon that Geant3.<BR>
I use the recommended algorithm for the energy loss calculation<BR>
(apportioning track length algorithm ).<BR>
May some specific settings have to be included in my input =3D
file<BR>
in order to cope with thin layer.<BR>
Any help is welcome !<BR>
&=3D
nbsp; &
n=3D
bsp; thanks in =3D
advance.<BR>
&=3D
nbsp; &
n=3D
bsp; =
=3D
Denis Bertini<BR>
&=3D
nbsp; &
n=3D
bsp; =
=3D
</FONT>
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