Pulse shape analysis for electron mobility study in cadmium zinc telluride gamma-ray detectors

Abstract

A pulse shape analysis technique was implemented to determine the electron mobility and the electron mobility lifetime product in cadmium zinc telluride detectors (CZT). The digital gamma finder (DGF-4C) a single-width CAMAC module produced by X-Ray Instrumentation Associates (XIA), was used to extract pulse height, pulse shape, and signal rise time information. Data analyses using the extracted information allowed measuring the and in selected CZT samples. An almost linear relationship was observed for the signal rise time as a function of the inverse bias. This observed linear relationship was the basis for determination of using a simple linear fit. The measured signal amplitude was also used to determine using the Hecht formulation. Repeated measurements confirmed the consistency of the method in determining and .Index Terms-Cadmium zinc telluride detectors (CZT), digital gamma finder (DGF-4C), electron mobility, pulse shape processing.

Simulation of gamma-ray distribution in rocks for determining the registration characteristics of measurement unit of horizontal borehole positional control system

“…Thorium and uranium emit radiation within a determined energy range, but with a specific peak frequency. Such peaks are especially distinct at energy levels of 2.62 MeV for thorium and 1.7 MeV for uranium (figure 1) (Mengesha et al 2004).…”