Results of the measurements carried out in order to verify the validity of the Poisson-exponential distribution in radioactive decay events

Berkson (Int. J. Appl. Radiat. Isot.; 26:543 (1975)), examining a series of 250,000 disintegration time intervals, found a significant departure of the distribution from the Poisson-exponential law and proposed to repeat the experiment using a large number of intervals and to check the interval recordings by using more than one recording instrument simultaneously. Accepting these suggestions the present authors have developed two systems of data collecting provided with different controls. In several experiments data were collected for more than one million decay intervals. The results elaborated using the Pearson chi2 test reflect a Poisson process of the radioactive decay events. (author)