Dear Andrew,
when you added the Iodide material you forgot to put the LOW-MAT card associated to it.
This card sets the correspondence between FLUKA materials and low-energy neutron cross sections.
If you look at the end of your output file, you would see an error like:
**** Low energy neutron xsec not found for some media 15 16 ****
Iodide
Please have a look at the manual for more details on the LOW-MAT card.
A simpler alternative option is to define your material as IODINE with capital letters.
The first IODINE element of the Table 10.4.1.2 of the manual will be used, which corresponds to the material at room temperature.
If this is suitable for you, you don’t need to add any LOW-MAT card, because low-energy neutron cross sections are available for this material.
Hope that helps,
Best regards,
Ilaria
On 18 Sep 2019, at 22:31, Andrew Hastings <ahasti4_at_lsu.edu<mailto:ahasti4_at_lsu.edu>> wrote:
Fluka group,
I took a functioning version of my program and copied it to a new folder. Now when I try a test run of 10000 particles, it attaches for the run and instantly finishes ok, but there is no USRDUMP. Normally, I’d have a 2 minute run time for 10k particles. Any idea why this copy isn’t running? I only added a geometrical region for a NaI detector in this version.
In my original program copy, the expected 2 min run time occurs, and I get the USRDUMP output successfully.
Kindest Regards,
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Andrew D. Hastings
Medical Physics and Health Physics Graduate Student (MS)
Louisiana State University
(225)333-8435|ahasti4_at_lsu.edu<mailto:ahasti4_at_lsu.edu>
<Cherdet.flair><Cherdet.inp><magfld.f>
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Received on Thu Sep 19 2019 - 13:42:49 CEST