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James Van Allen journal, 1951?-December 1954
Page 73
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[red pencil line below here:] Dr. K. C. Fisher, Superintendent of the Defense Research Northern Laboratory at Churchill, Manitoba, Canada see: Phys. Review 81, page 889 (1951) [red pencil line above here] ---------------------------------------------------------------------- "The Significance of the Absence of Primary Electrons for Theories of the Origin of the Cosmic Radiation" [T? J?]. M. Donahue The Johns Hopkins University Baltimore, Maryland (University of Pittsburgh) Abstract: "Electrons of energy above 5 Bev appear to constitute less than 0.4 percent of the primary cosmic radiation in a [tent?] on the earth. An analysis of acceleration per se on the basis of sign of charge or mass. The absence of high energy electrons must be explained on the basis of selective absorption. Bremstrahlung collisions in the galaxy or the solar system and radiation caused by motion in galactic or local magnetic fields
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[red pencil line below here:] Dr. K. C. Fisher, Superintendent of the Defense Research Northern Laboratory at Churchill, Manitoba, Canada see: Phys. Review 81, page 889 (1951) [red pencil line above here] ---------------------------------------------------------------------- "The Significance of the Absence of Primary Electrons for Theories of the Origin of the Cosmic Radiation" [T? J?]. M. Donahue The Johns Hopkins University Baltimore, Maryland (University of Pittsburgh) Abstract: "Electrons of energy above 5 Bev appear to constitute less than 0.4 percent of the primary cosmic radiation in a [tent?] on the earth. An analysis of acceleration per se on the basis of sign of charge or mass. The absence of high energy electrons must be explained on the basis of selective absorption. Bremstrahlung collisions in the galaxy or the solar system and radiation caused by motion in galactic or local magnetic fields
Van Allen Papers
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