Intrinsic Resolution of Compton Electrons in CeBr3 Scintillator using Compact CCT

TL;DR

This study measures the intrinsic energy resolution of Compton electrons in CeBr3 scintillator using a compact CCT setup, revealing non-proportionality as a key limiting factor and optimizing measurement parameters.

Contribution

First measurement of intrinsic energy resolution of Compton electrons in CeBr3 using a compact CCT setup with detailed analysis of resolution factors.

Findings

Non-proportionality limits CeBr3 energy resolution

Intrinsic resolution arises from processes beyond electron scattering

Optimized coincidence window improves measurement accuracy

Abstract

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"x1" CeBr3 detector using the sources, namely, 137Cs, 22Na and 60Co employing Compton Coincidence Technique (CCT). We have used PIXIE-4 data acquisition system which makes the measurement setup quite compact. The results have shown that non-proportionality is the major factor in limiting the overall energy resolution of CeBr3 and the intrinsic resolution in CeBr3 arises due to processes other than the scattering of electrons inside the scintillator. We have also studied the dependence of intrinsic energy resolution on the coincidence window and optimized its value for a given source