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On Fermi's Theory of the Origin of Cosmic Radiation
Phys. Rev. 82, 211 – Published 15 April, 1951
DOI: https://doi.org/10.1103/PhysRev.82.211
Abstract
Starting from Fermi's theory of the origin of cosmic radiation, an explanation of the observed shape of the energy spectrum of the proton component is suggested. On this basis there seems to be some indication that the majority of the protons originate from the nucleus of our galaxy. Assuming that the nucleus of the galaxy is a cluster of stars, the origin of the heavier nuclear components and protons of cosmic radiation can be explained on the same basis providing that an ordinary star can eject high energy particles (up to one Bev per nucleon). The observation of the effect of the sun on the heavier nuclear components may give a critical test of the theory.
The trapping magnetic field, if any, of the galaxy has a negligible effect on the energy spectra of cosmic radiation observed on the earth. The age of the galaxy is estimated to be greater than two billion years.
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