Two-way Low Background Alpha-beta Measuring Instrument
I. Use and Characteristics
HY-3322 type two-way low background alpha-beta measuring instrument is mainly used for environmental samples, radiation protection, medical and health care, etc.
Agricultural Science, Import and Export Commodity Inspection, Geological Exploration, Nuclear
Reclaimed water, biological samples, aerosols, foodstuffs, etc. in power plants and other fields
Measurement of total alpha and total beta in medical, soil and rock media.
This product conforms to GB/T 11682-2008 medium and low background alpha
Level II standard requirement of beta measuring instrument, while meeting the requirement of daily drinking
Total Alpha in Water Hygiene Standard GB5749-2006
Testing of beta radioactivity index.
The product is realized by waveform screening and TAC technology.
Recognition and measurement of alpha and beta radioactivity, the first technology in China
The comprehensive performance of the product is much better than that of the traditional method of distinguishing alpha and beta radioactivity by pulse amplitude.
It has the characteristics of low background, small cross-channel between alpha and beta, good long-term stability and simple software operation.
The main detector of this product uses zinc sulfide plastic composite scintillator as the main detector, and the detector is durable.
It can be scrubbed after slightly polluted surface, and no medium gas is needed for normal operation of the system; detector ruler
The inch is 45mm, 30mm, 50mm or customized according to user's requirements; the product adopts large area parallel plate.
As an anti-coincidence detector, the anti-coincidence efficiency of plastic scintillator is more than 99%, which can effectively reduce the system background.
HY-3322 can measure two samples at the same time. Two detectors work independently and two detectors are given respectively.
The total activity concentration of alpha and beta in the tested sample.
II. Major Technical Indicators
(1) Sensitivity: beta < 0.5*10-2~3*10-2Bq; alpha < 5*10-4Bq;
(2) Product background and efficiency:
For 90Sr-90Y beta source (active region 20mm), the background is less than 0.15cm-2min-1 when the 2pi efficiency ratio is more than 50%.
For 239Pu alpha source (active region 30mm) with 2pi efficiency ratio (>90%), background (<0.005cm-2min-1)
(3) alpha/beta crossover performance: the counting ratio of alpha to beta channel is less than 1.5% (239 Pu)
The counting ratio of beta entering alpha channel is less than 0.5% (for 90Sr-90Y)
(4) System stability:
Efficiency stability: the instrument is electrified for 24 hours, and the detection efficiency of each channel changes less than 10%.
Background stability: In 100 minutes of measurement time, background count changes in (Nb± 3)
Within the range, Nb is the average value of the base count and_is the standard error of the base count.
(5) Lead shielding room: thickness (> 8cm), easy to disassemble and install;
(6) Insulation resistance (> 2M).
(7) Voltage insulation greater than 1500V.
III. Working Conditions
(1) Temperature range: 5-35 degrees Celsius
(2) Humidity range: less than 85%(+30 C)
(3) Power supply: AC 220V (& plusmn; 10%), 50Hz
4. Workstation software (computer system is optional)
(1) Software working environment: Windows XP/Vaist/WIN7 and other platforms;
(2) Software Functions: Sample Measurement, Ben
Base measurement and real-time dynamic display of alpha,
Beta counting and spectrogram, efficiency calibration,
Powder Source Calibration, Water (Biology, Biology)
Sample calculation, error, etc.
Analysis and other functions.
