The use and adaptation of a process of aero-geophysics for special tasks of radiation protection

The problem was to apply a radiometric measuring system (with a detector crystal with a volume of 16.8 litres) which is part of the equipment of a BGR helicopter used for geophysical prospecting, for certain purposes of radiation protection. An extension of the existing EDP, the computer-controlled representation of results and of theoretical investigations was associated with this. Due to a larger flying program, documents on the natural radiation intensity in the Harz area and cover certain industrial, mining and waste disposal areas were produced. It is shown how the counting rates measured with the gamma ray spectrometer at altitude can be converted to equivalent dose rate of the radiation at ground level (for radiation sources distributed over large areas) by various corrections and conversions. The conditions in which a radioactive point source on the radiating earth's surface is traced by measurements in flight, are examined. A 256 channel analyser was used. (orig./HP)