Gamma spectrometer - radiometer QUADRO-HPGe
The spectrometer QUADRO-HPGe is intended for studying the energy distribution of gamma rays and measuring the activity (specific activity) of gamma-emitting radionuclides in environmental samples, process medium, industrial materials, food products and other samples. It also used in a radiological monitoring of environmental objects in analytical laboratories and in the nuclear industry.
The operation principle of spectrometers is based on the registration of gamma-quanta emitted by radionuclides contained in the samples by an appropriate type of detector, which outputs an electrical impulse with amplitude, which is proportional to the energy of the detected gamma-quantum.
As a semiconductor detector in QUADRO-HPGE applied serially produced high-purity germanium detectors from BSI. The cooling system (dewar with LN2 or electric cooler) is used to cool the detector. The work of spectrometer provides by spectrometric unit, which contains a low-voltage power supply, generator high voltage and analyser.
- multichannel analyzer BOZON or MCA-527;
- gamma-ray detectors based on HPGe: DH-10, DH-20, DH-30, and etc.;
- cooling system (dewar with LN2 or electric cooler);
- power supply adapter;
- software for spectrometric analyses;
- low-background passive chamber;
- software for spectrometric analisys ASW2;
The energy range of measuring distribution of gamma radiation : 40 to 3000 keV
Energy resolution for full-energy peak 1332,5 keV from radionuclide
Co-60 does not exceed : 2 keV
The integral nonlinearity of the spectrometer with detectors DH is in the energy
range of 40 to 3000 keV: ±0.05%
The detection efficiency of the spectrometer (with the relative efficiency
of 10% in comparison with the detector NaJ(Tl) with dimensions Ø3x3")
by full-energy peak Cs-137 (661.7keV) from point source at 50 mm
from the upper surface of the cryostat, is no less than : 0.4%
The measuring range of activity for Cs-137 for detector DH-10, (U=20%, k=2) : 2 - 1.5∙106 Bq
The minimum measurable activity of radionuclide Cs-137 (for detector DH-10)
at the ambient dose rate of no more than 0.2 µSv/h on the protection
surface and measurement time of 1 hour does not exceed: 1 Bq