INTENSITY OF 80 TO 200 MEV PROTONS OVER FORT CHURCHILL ON 26 AUGUST 1960.
MINNESOTA UNIV MINNEAPOLIS SCHOOL OF PHYSICS AND ASTRONOMY
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The intensity and energy spectrum of primary cosmic ray protons having energies between 80 and 200 MeV have been studied in nuclear emulsions flown on 26 August 1960 over Fort Churchill. The upper limit to the intensity between 80 and 150 MeV of 536 protonssq M.sec.ster obtained in this experiment is compared with with the value of 1216 protonssq M.sec.ster quoted by Vogt Primary cosmic ray and solar protons, Phys. Rev., 125366-377, 1962 from observations made just prior and just after this experiment. The reasons for this difference are discussed, and it is concluded that it is now unnecessary to make any assumptions for a relaxed modulation mechanism or for continuous solar emission of low energy protons. Author