How to get the scattered dose from concrete using MCNP5?

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SUMMARY

The discussion focuses on obtaining the scattered dose from concrete using MCNP5, a radiation transport code. The user is working on a shielding project and seeks to compare scattered dose with direct dose for a point detector receiving photons from a point source. They have attempted using tallies associated with energy bins but find it complicated to isolate scattered photons from concrete. A proposed method involves calculating the dose with air alone and then with both air and concrete, subsequently subtracting the two to derive the scattered dose from concrete.

PREREQUISITES
  • Familiarity with MCNP5 (Monte Carlo N-Particle Transport Code) version 5
  • Understanding of radiation dose calculations and tallies
  • Knowledge of photon scattering principles in materials
  • Basic concepts of shielding in nuclear engineering
NEXT STEPS
  • Research how to implement tallies in MCNP5 specifically for scattering events
  • Learn about energy binning techniques in MCNP5 for photon transport
  • Explore methods for isolating scattered dose measurements in radiation transport simulations
  • Investigate the effects of different materials on photon scattering in MCNP5
USEFUL FOR

Nuclear engineers, physicists, and students involved in radiation shielding projects or those utilizing MCNP5 for dose calculations will benefit from this discussion.

DF19
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Hello fellow nuclear engineers and physicists,

Does anyone know how to just get the scattered dose from a surface like concrete using MCNP5? I'm doing a project for a shielding class and I need to compare scattered dose and direct (uncollided) dose for a point detector. The photons are coming from a point source.

I've experimented with tallies associated with energy bins, but it's getting real complicated and I can't find a clever way to filter just the photons scattered from concrete.

My only theory is finding the dose with just air, then finding the dose with the concrete and air and subtracting the two to find the scattered dose from the concrete.
 
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Here is my input file, it has the geometry in it.
 

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