Fig. 1 TK-202 appearance and typical interface
Ⅰ. Product Introduction
TK-202 portable NaI gamma energy spectrometer has nuclide recognition, dose rate measurement and activity measurement and other functions. In the nuclide recognition, the tAime sequence analysis technology, fuzzy clustering technology and energy spectrum analysis technology are adopted, making the radionuclide recognition sensitivity higher in magnitude than that of the international similar products, which is the new generation of product in the similar products. TK-202 consists of NaI detectors, the host and the data analysis software. The detector and the host are connected together over Bluetooth, and they can be detached for remote measurement. The host uses a touch screen display that greatly simplifies instrument operation. TK-202 can identify 40K, 214Bi and 208Tl and other nuclides in the environment in real time, and uses the 609KeV ray of 214Bi, the 1460.8KeV ray of 208Tl, and the 2614.5KeV ray of 208Tl for fast and accurate energy calibration of the measurement system, which is the state-of-the-art energy calibration technology in the current environmental radiation monitoring.
Ⅱ. Main Features
l TK-202 has gamma radioactive nuclide identification, dose and dose rate measurement, activity measurement and other functions.
l TK-202 has the highest sensitivity on the gamma radionuclide recognition among the similar products in the world, and is a highly sensitive hand-held nuclide identification meter having the national independent innovation design. Thanks to the use of time series analysis technology, fuzzy clustering technology and energy spectrum analysis technology, its radionuclide recognition sensitivity is higher than that of the international similar products, with the typical indicators (with 2-inch NaI probe) as follows: "For 137Cs, when the dose rate is higher than 60% of the environmental background dose rate, the nuclide recognition time is not more than 0.7 seconds; when the dose rate is higher than 30% of the environmental background dose rate, the nuclide recognition time is not more than 7 seconds; for 241Am, when the dose rate is higher than 10% of the environmental dose rate, the nuclide recognition time is not more than 5 seconds; when the dose rate is higher than 20% of the environmental dose rate, the nuclide recognition time is not more than 0.7 seconds; for 60Co, when the dose rate is higher than 80% of the environmental dose rate, the nuclide recognition time is not more than 9 seconds.”
l The system is equipped with a characterized TK-105-B scintillation detector sourceless efficiency calibration software that allows the user to quickly measure radioactivity in situ when detecting artificial radionuclides.
Fig. 2 TK-105-B Souceless Efficiency Calibration Software Interface
l Thanks to the use of the time series analysis technology and fuzzy clustering technology, TK-202 can identify 40K, 214Bi, 208Tl and other nuclides in the environment in real time, and uses the 609KeV ray of 214Bi, the 1460.8KeV ray of 40K, and the 2614.5KeV ray of 208Tl for a quick and accurate energy measurement for the measurement system, which is the state-of-the-art energy calibration technology in the current environmental radiation monitoring.
Fig. 3 Energy calibration using the natural radionuclide in the air
l Software, hardware and time sequence statistical analysis are combined together for spectrum stabilization, so the drift of energy spectrum is controlled in real time, and the accuracy of long-term measurement can be reliably guaranteed.
l The contribution of the artificial radionuclide to the dose rate is given in real time.
l 6Li (Eu) is used as a neutron probe crystal.
l The detector is connected to the host via Bluetooth, and they can be detached for remote measurement.
l 5.5-inch large touch screen smart phone is used as a display, with full Chinese / English interface, having stylish and simple software interface, breaking the problems of complex operation of the traditional LCD display.
Ⅲ. Technical Specifications
l Detector: 2-inch NaI (Tl) detector (optional 3-inch NaI (Tl) detector, 6LiI (Eu) neutron detector and LaBr3 detector);
l Energy range: γ-ray: 25keV ~ 3MeV; neutron: thermal neutron ~ 14MeV;
l Dose rate range: 10nGy / h ~ 0.1mGy / h; with an additional G-M calculation tube, the upper limit of measured dose rate can reach up to 5Sv / h;
l Nuclide library and identifiable nuclide species: The latest nuclide library from the ENSF (Evaluated nuclear structure data file) has spectral lines for more than 3,000 radioisotopes. In the TK-202 report, the detected radionuclides are classified into industrial, medical, natural and special nuclear materials. The industrial category mainly include 60Co, 133Ba, 137Cs， 192Ir, 241Am, 75Se, and 152Eu. The medical categories mainly include 18F, 67Ga, 99mTc, 111In, 123I, 131I, 133Xe, and 201Tl. Natural radionuclides mainly include 40K， 226Ra， 232Th, and 238U. Special nuclear materials include 235U， 233U， 237Np, 252Cf and so no.
l Multi-channel analyzer: 1024 channels (with 4096 channels optional);
l Energy linearity: better than ± 1%;
l Energy resolution: better than 7% (@ 661.66keV);
l Sensitivity: 3000cps / μSv / h;
l Communication: Bluetooth wireless communication, with the communication distance of greater than 5 meters;
l Alarm: sound alarm and vibration alarm
l Calibration: changing with the temperature; natural nuclide automatic calibration spectrum stabilization;
l Power supply: four standards 9V, 680mAh rechargeable battery packs, with the capacity for the machine working for about 10h after charging.
l Control: three-key keyboard is provided for single-finger operation;
l Storage: at least 100,000 databases stored, with computer connection cables and supporting data communication software;
l Controller display: intelligent display, with 5.5-inch large touch screen;
l Operating temperature: -20 ℃ ~ 50 ℃;
l Working humidity: 10 ~ 90%;
l Dimensions: length x width x height: 313x163x227mm (not including the detector);
l Weight: less than 2kg.
Ⅳ. Applications
TK-201 can be used in the source searching, nuclear security at important sites, dose rate measurement, radionuclide identification, package radioactivity detection, and other fields. Combined with the sourceless efficiency calibration software produced by Beijing Tai Kun Industrial Equipment Co.,Ltd., the rapid measurement of activity at site can be achieved.
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