Galactic gamma-ray and neutrino emission from interacting cosmic-ray nuclei

We present a study of the expectations for very-high-energy (VHE) to ultra-high-energy (UHE) gamma-ray and neutrino emission from interacting cosmic rays in our Galaxy as well comparison latest results Galactic UHE diffuse emission. demonstrate importance properly accounting both mixed cosmic-ray composition absorption. adopt wounded-nucleon model nucleus interactions provide parameterisations resulting production. Nucleon shielding due clustering inside nuclei is shown have measurable effect on production gamma particularly evident close breaks cutoffs mixed-composition particle spectra. The change around `knee' ray spectrum has noticeable impact show that current near-future detectors can probe these differences key energy range 10 TeV 1 PeV, testing paradigm universality throughout Galaxy.