P. S. Freier
Published: 1965
Total Pages: 45
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Singly and doubly charged particles in the cosmic radiation were observed during a balloon flight made over Fort Churchill on the 28th July 1963. These particles were detected in nuclear emulsions mounted in a mechanical device which imposed unique temporal resolution between those entering during the balloon ascent and those entering while the balloon floated at ceiling altitude. The integral intensity at the top of the atmosphere of protons having E> 74 MeV was determined to be 2440 = 160 protons/sq-m ster.sec. while that of helium nuclei having E> 62 MeV per nucleon was 272 = 13 nuclei/sq.m ster. sec. The differential energy spectra of the protons and helium nuclei have been studied over the energy ranges of 74 MeV