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Published June 5, 1967 | public
Journal Article Open

Search for fractionally charged particles in cosmic rays near sea level

Abstract

An array of spark chambers and scintillation-counter trays has been used to search for fractionally charged particles in cosmic rays near sea level. No acceptable events have been found with energy losses by ionization between 0.04 and 0.7 that of singly charged minimum-ionizing particles. This experiment sets new upper limits for the fluxes of fractionally charged particles in cosmic rays, namely, 1.7×10^(-10) and 3.4×10^(-10) cm^-2 sr^-1 sec^-1 (90% confidence) for minimum-ionizing particles with charges 1/3 and 2/3, respectively.

Additional Information

©1967 The American Physical Society. Received 14 April 1967. Work supported in part by the U.S. Atomic Energy Commission. Prepared under Contract No. AT(11-1)-68 for the San Francisco Operations Office, U. S. Atomic Energy Commission.

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August 21, 2023
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