Radiometer of alpha and beta radiation RKBA-01 RADEK

Scintillation radiometer RKBA-01 RADEK is designed for measuring gross alpha and beta activity and also gross specific activity.

The radiometer represents a laboratory device which has a block design and consists of:
-          analog-to-digital-converter (MCA - multichannel analyzer) MD-198;
-          detection units BDA-60(70) and BDB-60(70);
-          A/C adapter for analyzer;
-          two low-background chambers with passive shielding from external alpha and beta – radiation;
-          computer;

A scintillator of ZnS(Ag) with diameter 60(70) mm is used as a detector in detection unit of alpha radiation BDA-60 (BDA-70). A scintillator of polystyrene with diameter 60(70) mm and thickness 1 mm is used as a detector in detection unit of beta radiation BDB-60 (BDB-70).

Pulse analyzer МD-198 technical information:
·         number of tracts - 2;
·         number of spectrum channels in MCA – 1024,2048,4096,8192;
·         minimum handling time of one measurement - 4 µs;
·         channel of connection with PC – USB; (in industrial construction RS-485);
·         channel capacity - 2³² countings.

Radiometer technical information (in pdf):
         Range of registered energies:
         ·         alpha - radiating radionuclides from 2000 to 10000 keV;
         ·         beta – radiating radionuclides from 65 to 4000 keV.
Sensitivity of radiometer to alpha - radiation of radionuclide ²³⁹Pu in a point geometry (from source “3P9”) on the distance 4 mm from the end surface of detection unit BDA-60 is no less than 0,3 (cps)/(Bq);
Sensitivity of radiometer to beta - radiation of radionuclide ⁹⁰Sr-⁹⁰Y  in a point geometry (from source “3С0”) on the distance 4 mm from the end surface of detection unit BDB-60 is no less than 0,24 (cps)/(Bq);
Range of activity measurement of alpha - radiating radionuclides with detection unit BDA-60 is 0,1 - 5·10⁴ Bq. Limit of the main permissible error of activity measurement doesn’t exceed ±20%.
Range of activity measurement of beta – radiating radionuclides with detection unit BDB-60 is 0,1 - 5·10⁴ Bq. Limit of the main permissible error of activity measurement doesn’t exceed ±20%.
Minimum detectable activity of radionuclide ²³⁹Pu with detection unit BDA-60 with background of external gamma-radiation 0,15 µSv/h and measurement time 3 hours doesn’t exceed 3∙10^-3 Bq.
Minimum detectable activity of radionuclide ⁹⁰Sr-⁹⁰Y with detection unit BDB-60 with background of external gamma-radiation 0,15 µSv/h and measurement time 3 hours doesn’t exceed 0,1 Bq.
Instability of radiometer readings with detection units BDA-60 and BDB-60 for 24 hours of  continuous operation is no more than 2,0 % when measuring the activity.

Radiometer operation is implemented by ASW program.

Pattern Approval Certificate of Measuring Instruments: RU.C.38.001A N42303-11.

MCA; gross activity;gross alpha activity

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