Intense research activities have been made in the development of high-Z and wide-bandgap compound semiconductor pixel detectors for the next generation X-ray and gamma ray spectroscopic imagers. Cadmium telluride (CdTe) and cadmium-zinc-telluride (CdZnTe or CZT) pixel detectors have shown impressive performance in X-ray and gamma ray detection from energies of few keV up to 1 MeV. Charge sharing and cross-talk phenomena represent the typical drawbacks in sub-millimeter pixel detectors, with severe distortions in both energy and spatial resolution. In this chapter, we review the effects of these phenomena on the response of CZT/CdTe pixel detectors, with particular emphasis on the current state of the art of the discrimination/correction techniques. The results from original energy-recovery procedures of multiple charge sharing events, recently developed by our group, are also shown.
Buttacavoli A., Principato F., Gerardi G., Bettelli M., Veale M.C., Abbene L. (2023). Charge Sharing and Cross Talk Effects in High-Z and Wide-Bandgap Compound Semiconductor Pixel Detectors. In High-Z Materials for X-ray Detection: Material Properties and Characterization Techniques (pp. 189-205). Springer International Publishing [10.1007/978-3-031-20955-0_10].
Charge Sharing and Cross Talk Effects in High-Z and Wide-Bandgap Compound Semiconductor Pixel Detectors
Buttacavoli A.;Principato F.;Abbene L.
2023-01-01
Abstract
Intense research activities have been made in the development of high-Z and wide-bandgap compound semiconductor pixel detectors for the next generation X-ray and gamma ray spectroscopic imagers. Cadmium telluride (CdTe) and cadmium-zinc-telluride (CdZnTe or CZT) pixel detectors have shown impressive performance in X-ray and gamma ray detection from energies of few keV up to 1 MeV. Charge sharing and cross-talk phenomena represent the typical drawbacks in sub-millimeter pixel detectors, with severe distortions in both energy and spatial resolution. In this chapter, we review the effects of these phenomena on the response of CZT/CdTe pixel detectors, with particular emphasis on the current state of the art of the discrimination/correction techniques. The results from original energy-recovery procedures of multiple charge sharing events, recently developed by our group, are also shown.
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