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Use of the autoradiographic technique for studying radioactive aerosols

Research paper by V. N. Lavrenchik

Indexed on: 01 May '65Published on: 01 May '65Published in: Atomic Energy



Abstract

The process in which black spots are produced in nuclear emulsions by β and ψ emitters with dimensions from 10μ down to hundredths of microns is discussed. A calibration curve is presented which relates activity to spot size for locally produced type XX film after 10-day exposures. By means of the technique which was developed; a spot size distribution was obtained for failout samples collected in the northern hemisphere in December 1962 and May 1963. It is shown that the distribution is of a hyberbolic type with a tendency toward increased slope with the passage of time after the instant of aerosol injection into the stratosphere.