Practical gamma scintillometry total count versus spectrometry

Abstract

The spectra of Uranium and Thorium are examined and a comparison made between logarithmic and linear plotting. This emphasises the relatively small number of counts recorded in the 1.76 MeV "uranium" peak and 2.62 "thorium" peak compared with total count. The preponderance of Bismuth 214 peaks in the spectrum is discussed and the lack of any outstanding peaks of other daughter products. Reference is made to work carried out by Mero on the use of lower energy emissions from other daughter products with indication of uranium assaying and determination of equilibrium. The use of simultaneous total count, gamma and beta from prepared samples in uranium assaying is described following work of Eicoltz and Daly & Urquart. This method also indicates the state of equilibrium. The energy spectrum of Thorium is compared with the Uranium Spectrum and the dissimilarities discussed.