A new method for the measurement of the activity of high-concentration 226Ra in solution based on 222Rn production rate.

Traditional methods for measuring the 226Ra activity are time-consuming and the equipment is large and inconvenient to carry. This article proposes a new method for quickly measuring the activity of high-concentration 226Ra using RAD7, which is simple to operate, does not require chemical separation. The 222Rn production rate is obtained by measuring the 222Rn concentration in a nonequilibrium state using RAD7, and the 226Ra activity is yielded according to the law of radioactive decay. Verification experimental results demonstrate that, compared with the FD125 measurement method, the proposed method reduces the measurement time by 92%, with result deviation within 6%. Therefore, the proposed method can provide technical support for rapid measurement during the 226Ra production process. [ABSTRACT FROM AUTHOR]