Rationale of Time-to-Count technology to measure radiant intensity

GM tube is widely used in the field of radiation measurement. But it's testing accuracy is low. Because the traditional measuring method is affected by the die-time of GM tube. This paper introduces the Time-to-Count technology, which is not affected by die-time and may enhance the testing accuracy of GM tube, and theoretically proves the mathematic rationale of this method. Thereafter, a new method for estimating radiant intensity is proposed, and the new estimate formula is proved to be an unbiased and asymptotic-optimum estimator, and the best estimator in the form of a/∑t_i. At last the correctness of this method is verified by computer simulation.