Registration energy range, keV Not less than 3 000 to 9 000, selectable separately for each alpha channel
Registration efficiency at least 30%
Energy resolution Not more than 20 keV
Registration efficiency of external radiation, shelf No. 1 No worse than 0.42±0.01PC/Bq
Registration efficiency of the external radiation, shelf No. 2 No worse than 0.32±0.01 impuls-Bq
Noise characteristics Full width at half-height less than 25 keV at 22°C
Background Less than 30 pulses per day
Sample size Sample diameter up to 3.5 cm
Detector holder type Horizontal
Detector-sample distance Adjustable from 1 to 5 mm
Non-linearity Less than +0.1% over full energy range
Detector power supply 100 V
Generator Instability less than 50 ppm/degree C. Frequency of about 100 pulses per second
Operating temperature range +5...+35
Continuous operating time at least 48 hours
Operating range of vacuum system 1-5000 millitorre
Pumping speed at least 5, 6 st. FT3/min.