Getting secondary electron emission

Hi, I’m trying to simulate and capture secondary electron emission. It should be produced by the protons hitting the GaN nanorods. The proton hits the nanorod and passes through or stops (depends on x*eV) but secondary electrons are not produced.

It seems to me that I’m missing something, maybe I have to define specific physical processes or configure particle/material properties, so I’m asking forum users to point me to articles or guides that will help me understand the steps I need to take to achieve my goal.

Hi !
I wonder with your energy regime. I ask you to go with post simulation techniques and read a bit how secondary electrons produced though you will have number of electrons produced depending on proton energy loss in defined material using Geant4.