The Research and Design of a Room-Temperature Nuclear Radiation CdZnTe Detector

Abstract

Cadmium zinc telluride (CZT) material is one of the preferred materials for the fabrication of X-ray and gamma-ray detector. In this paper, it is presented a room-temperature nuclear radiation detector system based on CZT material with planar electrode and ohmic-contact. The experimental validation and analysis of the designed system is carried out. At the same time, some research and design on the surface signal-readout method、the charge sensitive preamplifier circuit、pulse signal processing circuit and soft processing program is made. The signal from the CZT material exposed to the radiation through the experiment is successfully required. The signal from the experiment is correspondingly processed and validated. The potential factors that influence the detector performance are discussed. The conductive adhesive is the joint of the ohmic-contact electrode and the preamplifier circuitry. The preamplifier circuitry has high gain, rise time in the nanosecond level and little equivalent charge-noise. The research and experimental design base for the development of subsequent gamma spectrometer.