title: ENVIRONMENTAL RADIATION: MEASUREMENTS OF DOSE RATES.
abstract: The exposure dose from environmental sources of radiation was determined by means of an ionization chamber, by gamma-ray spectrometry in the field, and by measurements of radioactivity in soil cores. The exposure dose from cosmic radiation was found to be 4.4 +/- 0.2 micror/hr, that from natural radioactivity 8.0 +/- 0.3 micror/hr, and the contribution from fission products varied from 2.0 to 7.5 micror/hr during the interval in question.
mesh_terms: D003359:Cosmic Radiation; D011188:Potassium; D011827:Radiation; D011829:Radiation Dosage; D011886:Radon; D012106:Research; D013051:Spectrometry, Gamma; D013910:Thorium; D014501:Uranium
chemical_list: D014501:Uranium; D013910:Thorium; D011886:Radon; D011188:Potassium
keywords: COSMIC RADIATION; EXPERIMENTAL LAB STUDY; POTASSIUM; RADIATION; RADON; THORIUM; URANIUM