[Calibration of spectrometers for measuring irradiation of humans from incorporated potassium-40]

Combined calibration of 3 spectrometers of human radiations of various design and control measurement of potassium in one and the same group of persons were performed. Causes of divergence were analysed and readings of instruments within +/- 5% were summarized. The importance of selection of a calibration phantom which was radiometrically adequate to the human body and a necessity of establishing correlations between phantom parameters and anthropometric data on man were shown.