AirTrack Aerosol Monitoring Station and its two modifications AirTrack-Sr and AirTrack-Ge.
AirTrack-Sr is the state-of-the-art among aerosol monitors in terms of advanced design solutions for automatic alpha/beta and gamma spectrometric measurements.
The innovative unique use of a SrI2(Eu) scintillation crystal with high energy resolution and low intrinsic background ensures maximum reliability in the identification of gamma-emitting radionuclides and reduces the detection limit of radioactive aerosol concentration.
It is a budget friendly alternative to its higher performance version AirTrack-Ge equipped with electrically cooled HPGe detector and both detectors are interchangeable without any design modifications.
A special version of the Silicon Ion Implanted Detector with area 600 mm2 is used for alpha and beta spectrometry. The metalized coating of entrance window with thickness of less than 2 mm provides mechanical and chemical protection of the detector. Measurements can be carried out in high background conditions – compensation of radon, thoron and their progenies is performed algorithmically by spectrometric measurements, and passive lead shielding protects against gamma background radiation.
| Parameter | Value |
|---|---|
| Alpha and Beta Radiation | |
| Detector type | SIID 600 mm2 |
| Registration efficiency: – 241Am – 90Sr/90Y | not less than 0.15 not less than 0.2 |
| Alpha energy range | from 2 MeV to 10 MeV |
| Beta energy range | from 80 keV to 3 MeV |
| Measurement range of alpha-radiation volumetric activity | from 10^-2 to 105 Bq/m3 |
| Measurement range of beta radiation volumetric activity | from 10^-1 to 105 Bq/m3 |
| Gamma Radiation | |
| AirTrack-Sr | |
| Detector type | SrI2(Eu) (LaBr3(Ce), CeBr3 or NaI(Tl) optionally) |
| Gamma energy range | from 30 keV to 3 MeV |
| Energy resolution at the 662 keV line | 3.2% (for SrI2(Eu) 38.1×38.1 mm) |
| Measurement range of gamma radiation volumetric activity | from 10^-1 to 105 Bq/m3 |
| AirTrack-Ge | |
| Detector type | HPGe with electrical cooling |
| Gamma energy range | from 3 keV to 3 MeV |
| Energy resolution for energy 122 keV for energy 1.33 MeV | < 1000 eV < 2000 eV |
| Relative efficiency * | 30 % |
| Pump | |
| Nominal flow rate | adjustable, from 3 to 10 m3/h |
| Flow regulation accuracy | 2% max. |
| Noise level (ISO 2151) | not more than 62 dB(A) |
| Performance characteristics | |
| Power supply | 230 V / 50 Hz |
| Operating temperature range | +5°C … +40°C |
| * Note – for 1.33 MeV energy with respect to the 3×3 NaI(Tl) detector, when measured with a 60Co source at a distance of 25 cm from the detector |
