CaltechAUTHORS
  A Caltech Library Service

The Latitude and Longitude Effects in Cosmic Rays Over the United States and Canada at 30,000 Feet

Biehl, A. T. and Neher, H. V. (1950) The Latitude and Longitude Effects in Cosmic Rays Over the United States and Canada at 30,000 Feet. Physical Review, 78 (2). pp. 172-173. ISSN 0031-899X. http://resolver.caltech.edu/CaltechAUTHORS:BIEpr50

[img]
Preview
PDF - Published Version
See Usage Policy.

442Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:BIEpr50

Abstract

The change with geomagnetic latitude of the ionizing particles at 310 g/cm^-2 atmospheric pressure (30,000 ft.) that could penetrate various thicknesses of absorber was measured by Biehl, Neher, and Roesch [1] over a range of latitude of 64° geomagnetic north to the geomagnetic equator along latitude 80°W. These flights show that most of the latitude effect is over at 50° as one proceeds north and this was independent of the absorber used or whether the total radiation at that altitude was measured or only that near the vertical. On the other hand, Swann, Morris and Seymour [2] find a 10 percent increase for a 10° increase in geomagnetic latitude at 30,000 feet even beyond the "knee" of the curve. Although no mention of an absorber was made, presumably their measurements were made with a lead absorber. A number of flights having a further bearing on this point have recently been made, covering the latitude range particularly from 40° to 64° geomagnetic north with counter telescopes and ionization chambers, the latter both unshielded and shielded with 10 cm of lead.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRev.78.172DOIUNSPECIFIED
http://link.aps.org/abstract/PR/v78/p172PublisherUNSPECIFIED
Additional Information:©1950 The American Physical Society. Received 2 March 1950. We wish to express our gratitude to the ONR and the United States Air Forces for making these flights possible. We also wish to thank Major W.A. Gustafson, Captain Z. Shawhan, Captain George Freyer and other members of the crew of the B-29 for their cooperation and expert handling of the plane. Supported in part by the joint program of the ONR and AEC.
Funders:
Funding AgencyGrant Number
Office of Naval ResearchUNSPECIFIED
Atomic Energy CommissionUNSPECIFIED
Record Number:CaltechAUTHORS:BIEpr50
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BIEpr50
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11273
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:29 Jul 2008 05:00
Last Modified:26 Dec 2012 10:11

Repository Staff Only: item control page