Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors

Abstract Both material quality and detector performance have been steadily improving over the past few years for the leading room temperature radiation detector material cadmium-zinc-telluride (CdZnTe). However, although tremendous progress being made, CdZnTe still suffers from high concentrations o...

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Autores principales:	Utpal N. Roy, Giuseppe S. Camarda, Yonggang Cui, Ge Yang, Ralph B. James
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0f687fddede24776a07680af34bdeb43
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spelling	oai:doaj.org-article:0f687fddede24776a07680af34bdeb432021-12-02T15:55:04ZImpact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors10.1038/s41598-021-89795-z2045-2322https://doaj.org/article/0f687fddede24776a07680af34bdeb432021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89795-zhttps://doaj.org/toc/2045-2322Abstract Both material quality and detector performance have been steadily improving over the past few years for the leading room temperature radiation detector material cadmium-zinc-telluride (CdZnTe). However, although tremendous progress being made, CdZnTe still suffers from high concentrations of performance-limiting defects, such as Te inclusions, networks of sub-grain boundaries and compositional inhomogeneity due to the higher segregation coefficient of Zn. Adding as low as 2% (atomic) Se into CdZnTe matrix was found to successfully mitigate many performance-limiting defects and provide improved compositional homogeneity. Here we report record-high performance of Virtual Frisch Grid (VFG) detector fabricated from as-grown Cd0.9Zn0.1Te0.98Se0.02 ingot grown by the Traveling Heater Method (THM). Benefiting from superior material quality, we achieved superb energy resolution of 0.77% at 662 keV (as-measured without charge-loss correction algorithms) registered at room temperature. The absence of residual thermal stress in the detector was revealed from white beam X-ray topographic images, which was also confirmed by Infra-Red (IR) transmission imaging under cross polarizers. Furthermore, neither sub-grain boundaries nor their networks were observed from the X-ray topographic image. However, large concentrations of extrinsic impurities were revealed in as-grown materials, suggesting a high likelihood for further reduction in the energy resolution after improved purification of the starting material.Utpal N. RoyGiuseppe S. CamardaYonggang CuiGe YangRalph B. JamesNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Utpal N. Roy Giuseppe S. Camarda Yonggang Cui Ge Yang Ralph B. James Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors
description	Abstract Both material quality and detector performance have been steadily improving over the past few years for the leading room temperature radiation detector material cadmium-zinc-telluride (CdZnTe). However, although tremendous progress being made, CdZnTe still suffers from high concentrations of performance-limiting defects, such as Te inclusions, networks of sub-grain boundaries and compositional inhomogeneity due to the higher segregation coefficient of Zn. Adding as low as 2% (atomic) Se into CdZnTe matrix was found to successfully mitigate many performance-limiting defects and provide improved compositional homogeneity. Here we report record-high performance of Virtual Frisch Grid (VFG) detector fabricated from as-grown Cd0.9Zn0.1Te0.98Se0.02 ingot grown by the Traveling Heater Method (THM). Benefiting from superior material quality, we achieved superb energy resolution of 0.77% at 662 keV (as-measured without charge-loss correction algorithms) registered at room temperature. The absence of residual thermal stress in the detector was revealed from white beam X-ray topographic images, which was also confirmed by Infra-Red (IR) transmission imaging under cross polarizers. Furthermore, neither sub-grain boundaries nor their networks were observed from the X-ray topographic image. However, large concentrations of extrinsic impurities were revealed in as-grown materials, suggesting a high likelihood for further reduction in the energy resolution after improved purification of the starting material.
format	article
author	Utpal N. Roy Giuseppe S. Camarda Yonggang Cui Ge Yang Ralph B. James
author_facet	Utpal N. Roy Giuseppe S. Camarda Yonggang Cui Ge Yang Ralph B. James
author_sort	Utpal N. Roy
title	Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors
title_short	Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors
title_full	Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors
title_fullStr	Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors
title_full_unstemmed	Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors
title_sort	impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution x-and gamma-ray detectors
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0f687fddede24776a07680af34bdeb43
work_keys_str_mv	AT utpalnroy impactofseleniumadditiontothecadmiumzinctelluridematrixforproducinghighenergyresolutionxandgammaraydetectors AT giuseppescamarda impactofseleniumadditiontothecadmiumzinctelluridematrixforproducinghighenergyresolutionxandgammaraydetectors AT yonggangcui impactofseleniumadditiontothecadmiumzinctelluridematrixforproducinghighenergyresolutionxandgammaraydetectors AT geyang impactofseleniumadditiontothecadmiumzinctelluridematrixforproducinghighenergyresolutionxandgammaraydetectors AT ralphbjames impactofseleniumadditiontothecadmiumzinctelluridematrixforproducinghighenergyresolutionxandgammaraydetectors
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Impact of selenium addition to the cadmium-zinc-telluride matrix for producing high energy resolution X-and gamma-ray detectors

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