An Analog Computer Controlled Gamma-Ray Spectrometer for Comparative Activation Analysis

An instrument has been designed, constructed, and tested which performs real time comparative activation analysis. The instrument directly compares the gamma-ray spectrum for a standard and a mixed unknown to determine the weight of the desired species in the unknown sample. The problem of resolution in activation analysis determinations is discussed. The mathematical basis, design, and operation of the instrument are described, and the results of two test determinations are given.