The raw materials used in the scintillator are high purity raw materials, which are manufactured by haiqiang technology.
The use of zinc sulphide, which is used in the measurement of the alpha particles, is a key product of the technology.
The luminescent materials used in the low - ben-bottomed measurement instrument industry are mainly produced by the sea strong technology, and the dimethyl POPOP is only produced in China.
Technical parameters:
I. instrument background.
The bottom count rate of the alpha particle in the unit area is no more than 0.003cm-2min-1;
The background count rate of the unit area is less than 0.1cm-2min-1;
Ii. Detection efficiency.
Instrument for 239 pu alpha source (active area Φ 25 mm) of two PI detection efficiency more than 85% or higher;
Instrument for 90 sr - 90 y beta source (20 mm) active area Φ 2 PI detection efficiency more than 58% or higher;
3. Repeatability
Repeatability: the instrument was continuously measured for 24 hours, and the detection efficiency change was less than 2%.
4. Crosstalk ratio
The number of entries in the beta channel is less than 1% (for 239Pu),
The count of the entry into the alpha channel is less than < 0.3% (for 90sr-90y);
5. Instrument sensitivity.
Instrument sensitivity: alpha is greater than 5 x 10-5bq; Beta 1 x 10-6 or higher bq alpha beta scintillator
