Cesium Iodide as a Gamma Ray Spectrometer

Author(s): C. T. Schmidt
Publisher: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 1 June 1960
Volume: 7
Page(s): 25 - 28
ISSN (Paper): 0096-2015
DOI: 10.1109/TNS2.1960.4315730



Thallium activated cesium iodide is discussed as a gamma-ray spectrometer which should have advantages over thallium activated sodium iodide at high gamma-ray energies. Data are presented which were obtained with a five-inch diameter by three and one half-inch high right cylinder of thallium activated cesium iodide viewed with a three-inch diameter photomultiplier. These data include linearity of response from 80 kev to 7.2 mev, resolution as a function of gamma-ray energy, and photofractions as a function of gamma-ray energy for collimated radiation.