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Large area multiwire proportional counter

In ionizing radiation measurement, alpha and beta radioactive source measurement is a very important part of the radioactive activity measurement system. The surface emissivity of the alpha and beta
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Product Description

       In ionizing radiation measurement, alpha and beta radioactive source measurement is a very important part of the radioactive activity measurement system. The surface emissivity of the alpha and beta radioactive source can be used as a activity reference source or a test source to measure the scale and calibration of the instrument as well as the measurement of the radioactivity of the environmental samples as a standard of radioactivity measurement. The main measuring device of alpha and beta radioactive plane source is a large area of 2 pi multi wire proportional counter. The multifilament proportional counter is close to 100% detection efficiency for the measurement of alpha and beta radioactive plane sources. It is an absolute measurement method for 2 pi radioactive plane sources.

Technical characteristics:

 

1, in order to reduce the measurement background and improve the measurement accuracy, the anti coincidence technology is adopted.
2, integrated electronics circuit, instead of the traditional NIM plug-in, makes the system operation simpler and more reliable.
3. Special measuring software can set up various measuring conditions, and can show the plateau curve, and the results are clear at a glance.
4, the whole cabinet type design, the system integration is high.

 

Main technical indicators

 

(1) 1, active sample area: 1521cm;
(2) multi wire chamber volume: 39cm (long) x 39cm (wide) x 7cm (high);
(3) plateau characteristics: 241Am source: flat slope is superior to 1%/100V 90Sr-90Y source: Ping tilt is better than 2%/100V.
(4) background count rate: alpha source is not greater than 0.001cm-2*S-1; beta source is not greater than 0.05 cm-2*S-1
(5) repeatability: better than 1%
(6) surface emissivity: the relative deviation from the nominal value is within + 2%.
(7) the extended uncertainty is better than 1% (k=2)
(8) power supply: 220V 50Hz;
(9) the velocity of gas flow: 0 ~ 200sccm;

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