THE USE OF CALIBRATED IONIZATION CHAMBER FOR THE CERTIFICATION OF ²²⁶Ra RADIOACTIVITY

J.M. Lee, K.B. Lee, S.H. Lee, T.S. Park

Abstract

The efficiency of a ²²⁶Ra aqueous solution source in the radium-radon secular equilibrium against the gamma reference ionization chamber in KRISS has been obtained both by calculating from the photon energy-dependent efficiency curve of the ionization chamber and by measuring with an ²²⁶Ra standard source. The two results of calculation and measurement have showed such a good agreement that the gamma reference ionization chamber may be used to certificate the radioactivity of ²²⁶Ra aqueous solutions in the secular equilibrium and its traceability could be linked to the multi-radionuclide calibration of the ionization chamber.

Keywords

radon-222, radium-226, reference ionization chamber, radioactivity certification

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IMEKO TC

TC19 - Environmental Measurements

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