Simulating Inverse Beta Decay Process

Hello Everyone.

I am interested in simulating Inverse Beta Decay process where I will have a flux of electron anti-neutrino that will interact with the protons in the atoms of my detector volume and produce positrons. However, even after a thorough search, I couldn’t figure out which physics process to use or is there any reference/example I can look into. Therefore, could anyone please give me some insight on where to get started?