New Approach to Check-Up Exponential Decay Law

The approximated method of probability density function based on the decomposition of Laguerre orthogonal polynomials is proposed for processing of decay data.With the help of this method a decay of sixteen various isotopes is investigated. It is shown, that takes place a significant deviation from the exponential law of a decay in many cases, and the series of isotopes belong to the class of the ageing elements, and other isotopes - to the class of the rejuvenating elements. With the help of goodness-of fit tests is proved, that for a decay the hypothesis about an exponential distribution is not confirmed