Large or semi infinite radioactive source

Particles, Track, Event, Run and Biasing
1

Dear Geant4 users

I am working on the simulation of a large scale radioactive source contaminated by NORM ( soil contamination). THe challenge here is to reduce the time of calculation with a high accuracy.

I am asking if there is a properites in Geant4 that could help in that matter, as for PHITS we have
a Tally type named “T-point” in PHITS, which is designed for dealing with the situation when the source area is great larger than the detection area.

Thank you very much

1 Like
2

Dear @asmae_ettoufi

Thank you for your question.

The General Particle Source and the Radioactive Decay modules provide their own biasing methods [1,2], but I’m not sure if these are exactly what you’re looking for. Could you please confirm whether your goal is to simulate secondaries from radioactive decay within a specific solid angle corresponding to your detector’s acceptance?

Best,
Alvaro

[1] General Particle Source biasing: Geant4 General Particle Source — Book For Application Developers 11.3 documentation
[2] Radioactive Decay biasing: Event Biasing Techniques — Book For Application Developers 11.3 documentation