Compton scattering sequence reconstruction algorithm for the liquid xenon gamma-ray imaging telescope (LXeGRIT)

摘要

The Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT) is a balloon bornexperiment sensitive to \g -rays in the energy band of 0.2-20 MeV. The maindetector is a time projection chamber filled with high purity liquid xenon(LXeTPC), in which the three-dimensional location and energy deposit ofindividual \g -ray interactions are accurately measured in one homogeneousvolume. To determine the \g -ray initial direction (Compton imaging), as wellas to reject background, the correct sequence of interactions has to bedetermined. Here we report the development and optimization of an algorithm toreconstruct the Compton scattering sequence and show its performance on MonteCarlo events and LXeGRIT data.