Events

Abstract

This presentation summarizes the development of 3-dimensional position-sensitive (3-D) semiconductor gamma-ray detectors, including the advantages of 3-D single-polarity charge sensing and real-time gamma-ray imaging. High energy resolution of close to 0.30% FWHM at 662 keV have been experimentally demonstrated on 6 cm3 CZT detectors, and larger volume CZT detectors of 4x4x1.5 cm3 have been demonstrated. The 3-D detector technology has been applied for CsPbBr3 perovskite gamma-ray detectors in recent years, and better than 1.0% FWHM energy resolution has been achieved on detectors with thickness in the range of 5 – 13 mm. These results have shown promise of CsPbBr3 for high-resolution gamma-ray spectrometers and imagers.

The commercialization of room-temperature semiconductor gamma-ray detectors by H3D Inc., a spin-off company from University of Michigan, will be introduced. Applications include radiation safety in nuclear power plants, safeguard for IAEA nuclear inspectors, national security and emergency response, space applications, nuclear medicine imaging, as well as for basic science discoveries.

About the Speaker

Zhong He received his Ph.D. from Southampton University in U.K. in 1993. His research has covered all three major types of radiation detectors, including semiconductors, scintillators, gas detectors, and associated low noise, charge sensing Application Specific Integrated Circuits (ASICs). Since 1995, his research has focused mostly on the development of room-temperature semiconductor gamma-ray imaging spectrometers. He pioneered the 3-dimensional position-sensitive single-polarity charge sensing technology which has attracted sustained interests in national security, nuclear non-proliferation, homeland security, nuclear power industry, medical imaging, and planetary sciences. He has graduated 38 Ph.Ds as committee chair and has published more than 120 peer reviewed journal publications. He is the chairman of H3D Inc., a spin-off company from his research group that has sold CdZnTe gamma-ray imagers to more than 80% of nuclear power plants in the United States and Canada, as well as many in Europe and Asia, to IAEA Safeguard Department, to U.S. Department of Defense, DOE National Laboratories and university research groups. Zhong He also serves as the Chairman of MH3D Inc., and a Board of Directors of M3D Inc., two medical spin-off companies.