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The latitude effect for cosmic-ray showers

Neher, H. V. and Pickering, W. H. (1938) The latitude effect for cosmic-ray showers. Physical Review, 53 (2). pp. 111-116. ISSN 0031-899X.

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Cosmic-ray observations have been taken with Geiger counters on a voyage from San Francisco to Colombo via Japan and return via Australia. The apparatus used possesses some interesting features and is described at length. The latitude effect for vertical coincidences is found to be 14.5 percent in the region of the Dutch East Indies and 10 percent in the Pacific Ocean. The showers show a much smaller variation with latitude, only about 6 percent being found in the region of the East Indies. This result is interpreted as meaning that the latitude sensitive part of the radiation is not as efficient at producing showers as the nonlatitude sensitive radiation. Qualitatively at least, such behavior is consistent with the hypothesis that the latitude sensitive radiation is due to incoming electrons.

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Additional Information:©1938 The American Physical Society. Received 4 November 1937. We wish to express our appreciation to the Dollar Steamship Company and to Captain Murphy of the President Van Buren, also to the K.P.M. Line and to Captain Murphy of the Niew Holland, and to the Canadian Australasian Line for their cooperation and assistance in the experimental work here reported. We also wish to make grateful acknowledgment to the Carnegie Corporation which provided funds that made this work possible.
Issue or Number:2
Record Number:CaltechAUTHORS:NEHpr38a
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8950
Deposited By: Tony Diaz
Deposited On:08 Oct 2007
Last Modified:02 Oct 2019 23:55

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