A Study of the LXeGRIT Detection Efficiency for MeV Gamma-Rays during the 2000 Balloon Flight Campaign

摘要

LXeGRIT - Liquid Xenon Gamma-Ray Imaging Telescope - is the first prototypeof a Compton telescope for \MeV \g-ray astrophysics based on a LXe timeprojection chamber. One of the most relevant figures of merit for a Comptontelescope is the detection efficiency for \g-rays, which depends on diversecontributions such as detector geometry and passive materials, triggerefficiency, dead time, etc. A detailed study of the efficiency of the LXeGRITinstrument, based both on laboratory measurements and Monte Carlo simulations,is presented in this paper.