Interaction of low-energy electrons (0.1 eV -210 eV ) with matter simulation

Physics Processes, Models and Cross Sections
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Geant4 Version: 11.3.0
Operating System: microsoft-standard-WSL2 x86_64 x86_64 x86_64 GNU/Linux
Compiler/Version: g++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
CMake Version: 3.22.1

I was trying to model in Geant4 electron interaction with the walls of 2 thin layers of different materials. The energy range of electrons is between 0 eV and 210 eV. That conducted me to see build the elastic model based on ELSEPA data (as a discrete process) and the inelastic model (as a continuous discrete process) by computing cross sections using Gzysinski model.

Do you think this approach is right ? The problem I have is that I see too many interactions in the bulk and not just around the surface, and this is not in agreement with my expectations. The bulk material in yellow in this screenshot has a depth of 10 cm and the thin layer in blue is just 10 nm.

Thank you very much for your insight.

Best regards,

Sara,

image

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PS: The primary electron in this screenshot has an energy of 200 eV.

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Hello, why don’t you use the MicroElec Model to simulate low energy electrons,which contains secondary electron emission from surfaces? The example file location is in “advanced” examples.

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Thank you very much for your reply. I actually saw it a long time ago, but the problem is that there are some limitations on the materials on which I can apply this secondary electron emission model. I was hence trying to build something more generic that would work for my structure.