Hey there!
I would like to know whether it is possible for openmc to provide the energies of emitted particules. Let’s say for example, the energy of alpha particules emitted from an (n, alpha) reaction.
OpenMC does not at present track any charged particles, including alphas, so there is no way to get at that information. For outgoing photons, you could use our data API to look at the emission spectra in the underlying data files. See this notebook for a sense of how to use the openmc.data module.