GAMMA-1S/NB1-04

Description

Real-time monitoring as part of radioactive reconnaissance mobile laboratories
Environmental monitoring of various objects for contamination with gamma emitting radionuclides, also as part of mobile radiological laboratories
Laboratory measurements of various samples for the presence of gamma-emitting radionuclides
Radiation monitoring of areas close to radiation hazardous facilities: nuclear power plants, nuclear fuel cycle facilities, military sites, etc.

Gamma detecting device based on a Ø76×76 mm NaI crystal
Stabilization of measuring path based on a special LED with gain temperature correction
Digital processing of signals
Extended temperature range

Range of detected gamma energies	0,05 to 3 MeV
Energy resolution for the 662 keV gamma line (Cs-137)	8 % maximum
Absolute efficiency of gamma-quanta registration with energy of 662 keV (Cs-137) at a distance of 25 cm from the source to the detector	0.001 Bq-1s-1 minimum
Number of channels used by the spectrometer	1024
Limits of integral nonlinearity in the range of detected energies	±1 %
Time instability over the 24-h period of continuous operation	1 % maximum
Maximum statistical input load of the spectrometer,	1.5·10⁵ cps minimum
Operating mode setting time	30 minutes maximum
Continuous operation in ~220 V mains mode	unlimited
Activity measurement range for a Cs-137 radionuclide	8 to 1·10⁵ Bq the lower limit of the measured activity range is given for measurement time of 1 hour and point measurement geometry
Limits of tolerable basic relative error for activity measurement (Р = 0.95)	±(10 – 50) %
Range of gamma dose rate measurement with the basic relative error of 20 %	0.1 to 100 µSv/h
Enviromental	–20 to +50 °С
Dimensions: UDS-GC-7676-485-T detecting device	Ø116×345 mm
Weight: UDS-GC-7676-485-T detecting device	4 kg