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Atmospheric Ionizing Radiation and Human ExposureAtmospheric ionizing radiation is of interest, apart from its main concern of aircraft exposures, because it is a principal source of human exposure to radiations with high linear energy transfer (LET). The ionizing radiations of the lower atmosphere near the Earth s surface tend to be dominated by the terrestrial radioisotopes especially along the coastal plain and interior low lands and have only minor contributions from neutrons (11 percent). The world average is substantially larger but the high altitude cities especially have substantial contributions from neutrons (25 to 45 percent). Understanding the world distribution of neutron exposures requires an improved understanding of the latitudinal, longitudinal, altitude and spectral distribution that depends on local terrain and time. These issues are being investigated in a combined experimental and theoretical program. This paper will give an overview of human exposures and describe the development of improved environmental models.
Document ID
20040095933
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Wilson, J. W. (NASA Langley Research Center Hampton, VA, United States)
Goldhagen, P. (DHS Environmental Measurements Lab. New York, NY, United States)
Friedberg, W. (Civil Aerospace Medical Inst. Oklahoma City, OK, United States)
DeAngelis, G. (Old Dominion Univ. Norfolk, VA, United States)
Clem, J. M. (Delaware Univ. Newark, DE, United States)
Copeland, K. (Civil Aerospace Medical Inst. Oklahoma City, OK, United States)
Bidasaria, H. B. (University of Central Michigan Mount Pleasant, MI, United States)
Date Acquired
September 7, 2013
Publication Date
July 12, 2004
Subject Category
Geophysics
Meeting Information
Meeting: 35th COSPAR Scientific Assembly
Location: Paris
Country: France
Start Date: July 18, 2004
End Date: July 25, 2004
Sponsors: Committee on Space Research
Funding Number(s)
OTHER: 101-15-01
Distribution Limits
Public
Copyright
Public Use Permitted.

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