also Cosmic rays Cosmogenic nuclide Nuclear fission Nucleosynthesis Astrophysics Spall, or spalling Spallation Spallation Neutron Source ISIS neutron source PSI Spallation Neutron Source (SINQ) References Further reading External links Ray Isotope Spectrometer University of Leeds paper, proceedings of the 26th ICRC.(Link down, Jan 2011) Heavy Cosmic Ray propagation Using New Spallation Cross-Section Expressions, proceedings of the 26th ICRC.(Link down, Jan 2011) Evidence for cosmic ray spallation production of helium and neon found in volcanoes Cosmic rays Nucleosynthesis