The interaction of high energy photons with matter:
ionization, bremsstrahlung, Compton scattering,
electron-positron pair production, Cerenkov radiation;
photon spectra resulting from these processes;
nuclear interactions, cosmic rays and their interactions
in the atmosphere; dynamics and diffusion of charged
particles in magnetic fields, synchrotron radiation,
magnetic flux pinning, magnetic diffusion; gases and
magnetic fields in the nterstellar medium, acceleartion
mechanisms for charged particles, the energy spectra
of electrons, protons and nuclei in the Galaxy.
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