I would like to simulate proton (and other light ions) induced nuclear reactions, especially radiative capture, at low (<1MeV) energy. I am using geant version 10.05.p01. As I understand, ParticleHP uses mainly theoretical cross sections from TENDL for inelastic process down to 1 MeV, and the capture process is not available. Also, ParticleHP cross sections are not quite user-friendly. Therefore, I was thinking to use ParticleXS framework and its human-readable cross sections possibly more easily extensible by users. I understand that the cross sections can be found under G4PARTICLEXS1.1 directory but G4IonPhysicsXS does not seem to use it for proton. So my questions would be: (1) How can I correctly use (activate in PhysicsList) ParticleXS cross sections for protons? (2) What is your suggestion for the extension of the ParticleXS framework for capture reactions? Process, model or cross section?