FIELD: measuring technologies.
SUBSTANCE: method includes ionizing controlled gas by β or α particles with periodical collection of ionization charges from gas volume. Using charge-sensitive amplifier, only charge of gathered electrons is registered from each α and β particle, or in even time intervals, of adjustable length. To abolish ambiguousness of measurements in noble gases, ultra-pure molecular gas is added to them, effectively thermalizing electrons, drifting in gas under effect from electric collecting field.
EFFECT: broader functional capabilities, higher precision.
2 cl, 3 dwg
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