Counting strategies in radioactivity measurement for the monitoring and screening

One of the important things in low level radioactivity measurement is determination of the optimized counting time. Counting strategy has to be established, in order to count the radioactivity of the sample by condition of optimized measurement. There were three kinds of counting strategies in this report; about fixed time, about fixed count, to compared sample, background, and reference level. The best of them was satisfied condition to give about condition of instrument and process, as an example, efficiency of detector, counter capacity, maximum and average background count rate of counter, reference level and limit of decision and detection, etc. Therefore, we can decide the optimized counting time in the screening and monitoring. And we can save the time for counting the sample of course the data of count will be counted by optimized accuracy. Finally, in routine measurement of radioactivity these strategies will be used available