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20 August 2020 Multifunctional semiconductors for radiation sensors: crystal growth and characterization
Narsingh Bahadur B. Singh, Ian Emge, Brett Setera, Charmain Su, Fow-Sen Choa, Bradley Arnold, Kamdeo Mandal, Narasimha Prasad
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Proceedings Volume 11494, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXII; 1149406 (2020) https://doi.org/10.1117/12.2566996
Event: SPIE Optical Engineering + Applications, 2020, Online Only
Abstract
Heavy metal selenides have shown very good properties including wavelength conversion in MWIR and LWIR regions, acousto-optic and great potential for radiation detection. We have extensively studied thallium-based compounds for variety of applications. Studies were performed for crystal growth, fabricability and radiation detection characteristics of ternary congruent compounds of thallium mercury iodide system from the melt by Bridgman method. The congruency and phase transition was studied by DTA. Material melts congruently between 300-400 0C and do not show any other phases between room temperature and melting point. Crystal slabs were fabricated as bulk detector to demonstrate good characteristics for detectivity of X-ray and gamma-rays. Effect of impurities on performance were evaluated by using source materials of different purity for synthesis. Crystals with high purity source materials and mixed by vibrating method were determined for resistivity in range of 1012ohm-cm.
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Narsingh Bahadur B. Singh, Ian Emge, Brett Setera, Charmain Su, Fow-Sen Choa, Bradley Arnold, Kamdeo Mandal, and Narasimha Prasad "Multifunctional semiconductors for radiation sensors: crystal growth and characterization", Proc. SPIE 11494, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXII, 1149406 (20 August 2020); https://doi.org/10.1117/12.2566996
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KEYWORDS
Crystals
Sensors
Semiconductors
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