Abstract
Thallium doped sodium iodide scintillation detector is the most widely used scintillation detector in gamma spectrometry. Unfortunately, sodium iodide reaches insufficient energy resolution for many applications. This fact has led manufacturers to develop scintillators with better energy resolution such as LaBr3:Ce and CeBr3. The energy resolution of LaBr3:Ce is about 3 times better and the resolution of CeBr3 is about 2 times better than the resolution of NaI:Tl. On the other hand, the production costs is still a disadvantage of these newer scintillators. The paper deals with energy resolution functions comparison of the 1.5 inch NaI:Tl, CsI:Tl, LaBr3:Ce, and CeBr3 scintillation detectors. The measurements and analysis to find the best fitting functions for energy resolution were performed.
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