Research progress in airborne surveys of terrestrial gamma radiation

Details Research progress in airborne surveys of terrestrial gamma radiation Research progress in airborne surveys of terrestrial gamma radiation

Jun 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974stin...7628149b&link_type=abstract

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Physics

Aerial Reconnaissance, Gamma Rays, Nuclear Power Plants, Terrestrial Radiation, Ground Water, Radiation Dosage, Radioactive Isotopes, Snow Cover, Sodium Iodides, Thallium

Scientific paper

Progress during the last few years in airborne surveys of terrestrial gamma radiation, i.e. in the measuring, recording, and interpreting of gamma ray signals in NaI(Tl) crystals, is discussed. Non-terrestrial background contributions have been accurately characterized. The feasibility of determining the water equivalent of snow cover by aerial survey techniques has been demonstrated. Repeat surveys over areas surrounding reactor sites can now be used to detect average differences of less than 1.0 mu R/hr in terrestrial gamma radiation levels. New data acquisition and recording systems allow isotope concentrations and total inventories to be measured in spatial resolutions of a few hundred feet. Aerial survey data have been combined with population distribution data to obtain population exposure values from natural terrestrial gamma radiation around reactor sites.

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