In addition, as alternative, I used USRBIN Beampart in 1x1x2 mesh to calculate the attenuation coefficient as well. In this option I the minimal energy which still gives the results was 34 keV. If smaller, like 33 keV, gives me zeroes even with 29x1E7 primaries. I tried single scattering option, but no changes. However, in the manual I read that ~10kev of primary photons still should work, so I guess it's my mistake which I cannot see?.
Regards
Alex
From: 委v鋱k Aleksandras
Sent: Wednesday, 6 February, 2019 21:24
To: fluka-discuss_at_fluka.org
Subject: USRBDX zeroes below 340kev photon beam
Hello,
I was using usrbdx to score the current for linear mass attenuation calculation. The values were nicely matched against NIST tables, until I reached specifically 0.33 MeV beam value, and despite any change of parameter: a thickness, no of primaries, even a material itself - I get zeroes in output usrbdx sum.lis file no matter what I do. Yet 0.34 MeV still gives a result. What mistake here I am making? *.inp attached,
Regards
Alex
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Received on Wed Feb 06 2019 - 23:56:42 CET