Publications

ScintillationNaI(Tl)crystalsaretypicallyutilizedatroomtemperaturefordetectionof energeticphotonsinhighenergyandnuclearphysicsresearch,non-destructiveanalysisofmaterials testing, safeguards, verification of nuclear treaty, geological exploration and therapeutic imaging. Thepresentworkprovidesanewgeometryforthesource-to-detectorcombination. Aspecialorder cubicdetectorwithrectangularcavitywasused. Themathematicalexpressionsofthepath-lengths traveled by the incident photon as well as the geometrical solid angle were derived. The detector efficiency was determined for an axially positioned standard point-like gamma-ray source using the analyticalefficiency transfer technique. Geant4Monte Carlo simulation codewas also usedto predictthedetectorresponseunderthecalibrationgeometry. Theanalyticalefficiencytransferand Geant4simulationresultswerecomparedwiththoseobtainedexperimentallyandagoodagreement betweenthemwasshown.