A new method to improve the accuracy of radioactivity of sample

Abstract:

Detection efficiency of gamma rays is an important factor to affect the measurement accuracy of radioactivity. There are two methods to acquire detection efficiency currently, the standard sample method and Monte Carlo method. Both methods have their own problems which would result in system error of detection efficiency. A new method based on the above two methods is proposed. In this method, the detection efficiency ratio of the tested sample to the standard sample was calculated through Monte Carlo method, multiplied by the detection efficiency of the standard sample obtained from the experiment, and then the detection efficiency of sample tested is acquired. The correctness of the new method was verified by Monte Carlo software and proved that this new method could avoid the system errors from the standard sample method entirely and Monte Carlo method in most cases.