Hello George,
Thank you very much for your help and explain problem.
Best regards,
Adrian
________________________________________
Od: George Kharashvili <georgek_at_jlab.org>
Wysłane: 2 listopada 2017 14:05
Do: Knyziak Adrian
DW: FLUKA Discussion List
Temat: Re: Odp.: [fluka-discuss]: problems with materials (too short time of simulation)
Hello Adrian,
If you run your input without the LOW-MAT card, the run will end with the following error (written at the end of the .out file):
**** Low energy neutron xsec not found for some media 4 5 ****
GRAPHITE
Although there should be no neutrons in your problem, you are using PRESISIOn default, which, as the manual explains, automatically activates neutron transport: "Low energy neutron transport on down to thermal energies included". So, when the run is initiated, every material has to be linked to its corresponding low-energy neutron cross-section. GRAPHITE is not one of the FLUKA pre-defined materials and the code does not know which low-energy neutron cross-section to apply to it. Hence you must have the LOW-MAT card, as explained in the note 3 of the LOW-MAT manual page.
Regards,
George
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Received on Thu Nov 02 2017 - 15:27:48 CET