Average energy required per scintillation photon and energy resolution in inorganic, scintillation crystals for gamma-rays

Abstract

The Naverage energy per scintillation photon in NaI(Tl) crystals of 3" in diameter is determined to be 14.40/spl plusmn/0.14eV using a combination of experimental methods and Monte-Carlo simulations. The factors affecting the energy resolution is also examined from the point of the number of photons. The calculated resolution agrees well with the measured resolution.