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Record Details

Record 19 of 7842
Gamma rays from grazing incidence cosmic rays in the earth's atmosphere
External Online Source: doi:10.1086/187422
Author and Affiliation:
Ulmer, Andrew(Princeton Univ., Observatory, Princeton, NJ, United States)
Abstract: Interactions of grazing incidence, ultra high-energy cosmic rays with the earth's atmosphere may provide a new method of studying energetic cosmic rays with gamma-ray satellites. It is found that these cosmic ray interactions may produce gamma-rays on millisecond timescales which may be detectable by satellites. An extremely low gamma-ray background for transient gamma-ray events and a large area of interaction, the earth's surface, make the scheme plausible. The effective cross section of detection of interactions for cosmic rays above 10(exp 20) eV is found to be more than two orders of magnitude higher than Earth-based detection techniques. This method may eventually offer an efficient way of probing this region of the cosmic-ray energy spectrum where events are scarce. In this paper, a conceptual model is presented for the production of short bursts of gamma-rays based on these grazing incidence encounters with the Earth's atmosphere.
Publication Date: Jul 10, 1994
Document ID:
19950028614
(Acquired Dec 28, 1995)
Accession Number: 95A60213
Subject Category: ASTRONOMY
Document Type: Journal Article
Publication Information: The Astrophysical Journal (ISSN 0004-637X); 429; 2, pt; p. L95-L97
Publisher Information: United States
Contract/Grant/Task Num: NAG5-1901
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Inst. for Space Studies; New York, NY, United States
Description: 3p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: COSMIC RAYS; DETECTION; EARTH ATMOSPHERE; GAMMA RAY BURSTS; GRAZING INCIDENCE; PREDICTIONS; ARTIFICIAL SATELLITES; ENERGY REQUIREMENTS; ENERGY SPECTRA; ESTIMATES; FREQUENCIES; TIME CONSTANT
Imprint And Other Notes: The Astrophysical Journal vol. 429, no. 2, pt. 2 p. L95-L97 July 10, 1994
Availability Source: Other Sources
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