FIELD: nuclear radiation measurements.
SUBSTANCE: gas sample is selected and transmitted into measurement chamber provided with semiconductor detector. Alpha rays are registered and results of measurement are subject to processing. Before transmitting sample into measurement chamber, the sample is subject to cooling for freezing moisture out inside aid for preliminary cooling of gas sample. Metallized surface of detector is cooled down till temperature providing radon condensation.
EFFECT: improved efficiency of registration; reduced lower limit of measurement; improved precision.
5 cl, 1 dwg
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