Health and Safety Laboratory Report 109

Report presenting a large number of measurements of natural environmental radiation in various parts of the United States using a 20-liter air filled polyethylene-walled ionization chamber at atmospheric pressure. The ionization current was measured with a vibrating reed electrometer connected as a continuously reading voltmeter driving a pen recorder" (p. 1)

Health and Safety Laboratory Reports

From Introduction: "In this report, a detailed description will be given of each of the ionization chambers used, including in each case a discussion of the methods of calibration and of techniques utilized in inferring dose readings.

Health and Safety Laboratory Reports

From Abstract: "The results are compared with those obtained by other methods, and an application to the problem of uniformly and continuously distributed point-source is discussed.

Health and Safety Laboratory Report HASL-3

Report that examines the dose rate of radiation in the air and in a test subject due to radioactive materials (uranium, thorium, and potassium) that are present in the ground. The test subject in these experiments is a water cylinder that is meant to receive radiation in a manner similar to a person

Health and Safety Laboratory Report HASL-145

Report describing the use of a 5" x 3" NaI(Tl) detector and a high pressure ionization chamber to obtain gamma ray spectra and total gamma dose rates at approximately 100 locations during the course of several survey trips in the southeastern, central, and western United States. Reasonably precise elements of the dose rates are made using the pulse height spectra and relatively simple methods of analysis. Total terrestrial dose rates as well as the partial dose rates from the uranium-238 series, thorium-232 series, potassium-40, zirconium-niobium-95, and rhodium-106 are tabulated for each location

Health and Safety Laboratory Reports

From Introduction: "We discuss in detail the equipment, calibration procedures, and techniques used to analyze the spectra, present evidence to substantiate the validity of the dose rate estimates, and examine several problems associated with field measurements, in particular the effects of radon migration from the soil, soil moisture, and fallout.

Health and Safety Laboratory Reports HASL-73

Report documenting the investigation of cosmic and terrestrial background radiation. "Remeasurements in many locations furnished estimates of dosimetric increase in terrestrial levels due to fallout. Radiation measurement sin residential dwellings in he New York metropolitan areas are described" (p. 1)

Health and Safety Laboratory Report HASL-25

Report regarding ion chamber measurements made of the external environmental radiation in various location in the United States during the summer of 1957