Dear Expert, I have a question regarding energy deposition behavior when I simulate a photon beam. When I use an incident photon energy of 33.3 keV (3.33e-5 GeV), the beam stops at the first absorber, which is aluminum, and there is no energy deposition in any layer of the structure. However, with …

Dear Shubham, please have a look at this post: [image] USRBDX and USRTRACK Scoring Dear Chailin, The default minimum particle kinetic energy in FLUKA using the PRECISIOn default is generally 100 keV, except for photons and neutrons. In case of photons it is 33 keV and 1e…

Dear David, Thanks. It works, although it takes much longer time to run. I added the cards in the following way with MAt : blckhole to @lastmat because geometry uses many materials. Is that ok? just to be sure. Thanks [Screenshot 2024-11-05 154411] Reagrds Shubham

[image] Shubham Agarwal: It works, although it takes much longer time to run. Of course: the code needs now to track (much) more secondary particles, down to a significantly lower energy. The electron threshold often dominates the simulation time. [image] Shubham Agarwal: blckhole to @l…

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Unexpected Energy Deposition in Photon Beam Simulation

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