Abstract
The spatial distribution and energy spectrum of trapped protons observed by Injun 1 (1961) are in agreement with the suggestion that low energy protons found at L > 1.6 result from the radioactive decay of neutrons produced in the polar atmosphere by solar protons. Large fluxes of 1- to 15-Mev protons are found as low as L = 1.4, however, indicating that several modifications are required in Lenchek's model for the Nerv results. These modifications are discussed qualitatively. The Injun 1 fluxes of 1- to 15-Mev protons agree with the Relay 1 fluxes of 1.1- to 14-Mev protons in the region 1.6 40 Mev) protons and the low energy (E ≲ 1 Mev) protons or ions of comparable rigidity have a similar spatial distribution, but the distribution of intermediate energy (1 40 Mev, the parameters of the spectrum were determined assuming both power law and exponential forms. The parameters are presented as a function of L, and in the case of the exponential form the parameter E0 can be represented by E0 = 47L−3.2.
Published Version
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