Description
Application
Borehole Gamma Spectrometer is used for:
- Determination of underground orientation of transuranium ores in their natural beddings (headings, mines, boreholes)
- High precision gamma-spectrometry of radionuclides for inspection of sea bed, water sealed mines, water filled boreholes, radionuclide migration in groundwater
- Gamma-spectrometry using the neutron-activation method of substance analysis
COMPLETE SET
Borehole Gamma Spectrometer consists of: A. Spectrometric probe
- Spectrometric gamma-radiation detection unit based on HPGe detector with built-in preamplifier of signals.
- cooling system options:
- Cryoaccumulator
- Stirling cycle cryocooler
- Liquid nitrogen
- Spectrometric device
- Protective housing
- Well-logging borehole connection cable
B. Ground workstation
- Data processing and analysis software SpectraLineGP
- Personal computer
- Borehole cable and connectors set
SPECIFICATION
| Parameter | Value (Cryoaccumulator) | Value (Stirling cryocooler) | Value (Liquid nitrogen) |
|---|---|---|---|
| Relative efficiency (with respect to 3’’ x 3’’ NaI detector and Co-60 source mounted 25 cm above the detector) at 1.33 MeV g-photon* | 10 % | 10 % | 10 % |
| Resolution at 122 KeV at 103 s-1 Resolution at 1.33 MeV | < 1000 eV < 1.9 keVo | < 1.5 keV < 3.2 KeV | < 1000 eV < 2.00 keV |
| Energy range of detector operation | 100 keV – 3.5 MeV | 100 keV – 3.5 MeV | 100 keV – 3.5 MeV |
| Diameter of protective housing | 65 mm | 80 mm | 70 mm |
| Length of Borehole Probe | 1450 mm | 1250 mm | 1550 mm |
| Cooling time | < 10 hours | < 12 hours | < 8 hours |
| Autonomous operation time | > 8 hours | > 15000 hours | > 10 hours |
| * – Borehole detection unit could be equipped with HPGe detector with efficiency up to 40%. |
