They have overabundances of lithium, beryllium, and boron relative to the sun, in part due to secondary species production by spallation reactions with interstellar gas.
These undergo resonant pion production above energies of approximately 1020 electronvolts, resulting in the Greisen-Zatsepin-Kuzmin cutoff. They have overabundances of lithium, beryllium, and boron relative to the sun, in part due to secondary species production by spallation reactions with interstellar gas. Auger investigated the extensive air-showers that occur when high-energy ones strike the top of the atmosphere. The first pion, muon and positron detections occurred during studies of, FTP, what high-energy particles produced across the universe?
These undergo resonant pion production above energies of approximately 1020 electronvolts, resulting in the Greisen-Zatsepin-Kuzmin cutoff.
cosmic rays