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 at inspection of sea bed, water sealed mines, water filled boreholes, radionuclide migration in groundwater;
-
Gamma-spectrometry at neutron-activation method of substance analysis.
COMPLETE SET
Borehole Gamma Spectrometer consists of:
- Spectrometric Probe
-
Ground workstation
Spectrometric probe consists of:
- Spectrometric gamma-radiation detection unit based on high-purity germanium detector with built-in preamplifier of signals.
- Alternatives for Cooling System:
- Cryoaccumulator,
- Stirling cryocooler;
- Liquid nitrogen,
- Spectrometric device;
- Protective housing;
- Well-logging borehole connection cable;
Ground workstation consists of
- Data processing and analysis software SpectraLineGP;
- Personal computer;
- Borehole cable and connectors set.
TECHNICAL CHARACTERISTICS
|
Parameter |
Value |
|
Cryoaccumulator |
Stirling cryocooler |
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 % |
|
Resolution at 122 KeV at 103 s-1 Resolution at 1.33 MeV |
< 1000 eV
< 1.9 KeV |
< 1.5 KeV
< 3.2 KeV |
< 1000 eV
< 2.00 KeV |
| Energy range of detector operation |
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%.
