In 2004, Pico Envirotec(PEI) Company introduced new airborne gamma-ray spectrometers-GRS10 and GRS 16, which can be used to detect natural and artificial radioactive pollution. Both of these instruments are intelligent and self-adjusting gamma-ray spectrometers made of NaI(TI) large-volume detector arrays. The hardware used is the same, but the data output format is different. GRS 10 can be connected to 10 detectors, and each detector can output data independently, or can accumulate to 256 channels or 5 12 channels. GRS 16 can connect 16 detectors and record up to 5 12 energy spectrum data. GRS 10/ 16 reduces the "dead time" compared with the previous gamma spectrometer, mainly because the digital pulse detector developed by PEI is used instead of the digital amplifier, thus improving the linear characteristics of PMT (photomultiplier tube) crystal pulse detector. In addition, the data quality of independent 5 12 energy spectrum is relatively high, and many new technologies can be used to eliminate the interference of radon. The survey of GPX aerial survey company in Namibia shows that GRS 10 is effective. After several years' development, Pico Company introduced AGRSγ spectrometer, which can record 1024 energy spectrum information, and has the ability of full automation and self-stabilization. Based on this, Pico Company has developed a brand-new automatic airborne gamma-ray spectrum measurement system AirSPEC (Figure 1), which can integrate magnetometer and TDEM.
Figure 1 AirSPEC gamma ray energy spectrum measurement system
Second, the scope of application and application examples
Used to detect natural and artificial radioactive pollution.
Three. sources of information
. Au/2 14Pb radon removal. pdf, 2004.
Pico Envirotec's high-altitude flight? Resolution gamma? Ray spectrometer
Product catalogue [EB/OL]. /environment/.20 1 1