CZT Detector Development for New Generation Hard-X Astronomical Instruments

Physics – Medical Physics

Scientific paper

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Scientific paper

In the context of the definition of a future European gamma-ray mission, following the now on-orbit INTEGRAL observatory, we are carrying out a feasibility study on a Gamma Ray Wide Field Camera (5-500 KeV) for transient event detection. Recent achievements in high energy astronomy have validated the CZT detectors performances in terms of good spatial resolution, detection efficiency, energy resolution and low noise at room temperature. We started a development program aimed to explore the possibilities to improve and optimize the performance of this kind of detectors, acting at the level of both the readout system and crystal quality. Preliminary results of characterization of pixelated crystals provided by IMARAD (now Orbotech) are presented, along with their analysis and interpretation based on an analytical model of signal formation.

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