Hello everyone,
I learned a lot with @msacrist 's help in determining a material’s mass attenuation coefficient. I express my gratitude to him.
Now, I want to determine the mass attenuation coefficients in the gamma energies emitted by different point sources using the Hi-prope card. But my USRBDX results are showing zero. May I know the reason for this?
From in (appearing first in your input) to out (following the previous), as you called them.
Moreover, you miss the RADDECAY card (see Note 8 of the BEAM card), and in this case photons are not BEAMPART, so they cannot be scored as such.