Abstract:

To study and demonstrate the basic characteristics of gamma ray spectroscopy and to understand the various mechanisms interaction with matter. This paper investigated gamma ray spectra from several radioactive sources, by using thallium activated sodium iodide NaI(TI) and high purity germanium HPGe detectors. The energy dependence of full energy peak efficiency and resolution of NaI(TI) and HPGe by using gamma ray spectroscopy were demonstrated in this work. Spectra were produced for a 137Cs and 60Co source, illustrating the interaction mechanisms that result in partial or complete deposition of incident gamma ray energy in the detector. The results of present showed that the difference between NaI(TI) and HPGe detector. The study indicated that the resolution of HPGe detector is better than NaI(TI) detector. In addition, efficiency of NaI(TI) detector is better efficiency than HPGe detector.

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