Dear Mehmet,
The value you enter in the WHAT(1) of the START card represents the primary histories that the code simulates. You can increase it to improve statistics (increasing the running time).
The units of USRBDX are "cm-2 GeV-1 sr-1 per incident primary", therefore the result you see in the tab.lis in bin 21 (the incoming) is 2.5E-3 cm-2 GeV-1 sr-1 per incident primary.
In your particular case you will need to normalize it by * 400 cm^2 * 0.001 GeV *100000 (BEAMPART). Using the same procedure in your tab.lis bin 22 (exiting) you get a slightly lower value, as expected.
Kind regards,
Ricardo

//Ricardo dos Santos Augusto
TRIUMF-EH&S TRL Rr-7
4004 Wesbrook Mall,
Vancouver, BC V6T 2A3, Canada//
________________________________
De : Mehmet Bektaşoğlu [mehmetb_at_sakarya.edu.tr]
Envoyé : vendredi 15 novembre 2019 13:58
À : Ricardo Manuel Dos Santos Augusto
Cc : fluka-discuss_at_fluka.org
Objet : Re: [fluka-discuss]: Attenuation coefficient for photons in a material
Dear Experts,
Thank you Ricardo for the reply. I see a non-zero value as you point out. However, I start the beam in vacuum and try to count them as soon as they pass the boundary material. I could probably be missing a very simple point that I cannot figure out. Please forgive my ignorance but I think I should expect to see the number of beam particles (100 000, due to no interaction in vacuum?). Am I not correct? Also it only takes a couple of seconds to say 'Finished OK' without any progress (no green bar appears). Shouldn't the program run for a while?
Thank you for any further help in advance,
Mehmet
Ricardo Manuel Dos Santos Augusto <r.s.augusto_at_cern.ch<mailto:r.s.augusto_at_cern.ch>>, 15 Kas 2019 Cum, 07:44 tarihinde şunu yazdı:
Dear Mehmet,
As the particle scored is BEAMPART the code assumes that they could also be neutrons and therefore it adds the low energy group to the requested energy bins. This results in a lot of zeros in the output.
However, you should see a non zero value at the 262th energy interval in the tab.lis. Could you check that line? Conversely you may also look into the sum.lis values (e.g. the Part/pr entry).
Best regards,
Ricardo
 
//Ricardo dos Santos Augusto
TRIUMF-EH&S TRL Rr-7
4004 Wesbrook Mall,
Vancouver, BC V6T 2A3, Canada//
________________________________
De : owner-fluka-discuss_at_mi.infn.it<mailto:owner-fluka-discuss_at_mi.infn.it> [owner-fluka-discuss_at_mi.infn.it<mailto:owner-fluka-discuss_at_mi.infn.it>] de la part de Mehmet Bektaşoğlu [mehmetb_at_sakarya.edu.tr<mailto:mehmetb_at_sakarya.edu.tr>]
Envoyé : jeudi 14 novembre 2019 16:14
À : fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>
Objet : [fluka-discuss]: Attenuation coefficient for photons in a material
Dear FLUKA Experts,
I have been struggling to calculate the mass attenuation constant for any material with extremely little knowledge of FLUKA. I have lastly tried the program given by Andrea (mu.inp) in
http://www.fluka.org/web_archive/earchive/new-fluka-discuss/11329.html
When I run Flair (1 Cycle) it says 'Finished OK' almost right away (no action in the 'Primaries' bar though). It produces mu001_fort.21 and mu001_fort.22 along with other output files. I ran:
$FLUPRO/flutil/usxsuw
Type the input file:mu001_fort.21
Linear mass attenuation coefficient
DATE: 11/14/19, TIME: 16:47:55
100000.
100000
0
1
Type the input file:
Type the output file name:in
It produces in_tab.lis but zero for all energies. I would appreciate any help.
Best regards,
Mehmet
Mehmet Bektasoglu
Sakarya University, Department of Physics
http://www.mehmetb.sakarya.edu.tr<
http://www.mehmetb.sakarya.edu.tr/>
+90 (264) 295 6080
--
Mehmet Bektasoglu
Sakarya University, Department of Physics
http://www.mehmetb.sakarya.edu.tr<
http://www.mehmetb.sakarya.edu.tr/>
+90 (264) 295 6080
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Received on Sat Nov 16 2019 - 19:46:36 CET