Intrinsic Resolution of Compton Electrons in CeBr 3 Scintillator Using Compact CCT

CeBr3 is emerging as one of the best scintillators having properties almost similar to cerium-doped lanthanum halide scintillators. We have measured, for the first time, the intrinsic energy resolution of Compton electrons in a cylindrical $1^{\prime \prime }\times 1^{\prime \prime } \text {CeBr}_{3}$ detector using the sources, namely,137Cs, 22Na, and 60Co employing Compton coincidence technique. We have used the PIXIE-4 data acquisition system that makes the measurement setup quite compact. The measurements of intrinsic energy resolution of Compton electrons were made in the energy range of 0.1–1 MeV. The measurements of intrinsic energy resolution of gamma rays were also made, for the comparison. The preliminary results have clearly suggested that $\delta $ -ray component is a major contributor to the intrinsic resolution of CeBr3.