SCINTILLATION SPECTRA FROM THICK SOURCES

Abstract

Graphs are presented showing the variation of different characteristics of scintillation spectra when the thickness of the source is altered. Correlation curves between the valley-to-peak ratio and the other characteristics enable tests to be made to decide whether or not changes such as the apparent change in resolution of a spectrum from the resolution obtained with a point source is due to the thickness of the source or to the presence of secondary gamma rays.