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Parameters and characteristics .
Si-39g
GM counter for registration of hard gamma-radiation up to 5 Roentgen/hour.
Working power 360 ... 440 Volt
Plateau length: at least 80 Volt
Plateau slope: not more than 0.2%
Self noise: not more than 0,16 pulses/sec
Sensitivity: 19.5 ... 21.5 pulses/mkRoentgen
or
Sensitivity: 10.5 ... 14.1 mkA/Roentgen/hour
Pulses amplitude = 50 Volt
Allowable radiation during 1 min: not more than 5 Roentgen/hour
Working life: 1010 pulses
Length of counter: no more than 93.5 mm
Diameter of counter: no more than 15 mm
Weight: 8 gramme
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