Cover: Age of Cosmic Rays and Abundance of Antimatter in Our Galaxy.

Age of Cosmic Rays and Abundance of Antimatter in Our Galaxy.

Published 1969

by Leona Marshall Libby

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Acceptance of a disc-halo structure for the galaxy, together with cosmic ray evidence, leads to the conclusion that cosmic rays are older than 100 million years, and to the conclusion that the abundance of antimatter in the entire galaxy is less than 3x0.0001. 7 pp. Refs. (Author)

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