Conference proceeding
Characterization of secondary phases and other defects in CdZnTe
Proceedings of SPIE, Vol.7805(1), pp.780503-7805017
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII
08/23/2010
Handle:
https://hdl.handle.net/2376/107645
Abstract
Semiconducting CdZnTe or "CZT" crystals are very suitable for use as a room temperature-based gamma
radiation spectrometer. During the last decade, modifications in growth methods for CZT have significantly improved
the quality of the produced crystals however there are material features that can influence the performance of these
materials as radiation detectors. For example, various structural heterogeneities within the CZT crystals, such as, pipes,
voids, polycrystallinity, and secondary phases (SP) can have a negative impact on the detector performance. In this
study, a CZT material was grown by the modified vertical Bridgman growth (MVB) method with zone leveled growth
in the absence of excess Te in the melt. Numerous SP were imaged using transmission IR at a volume % of 0.002.
Samples from this material were analyzed using various analytical techniques to evaluate its electrical properties, purity
and detector performance as radiation spectrometers and to determine the morphology, dimension and elemental
/structural composition of one of the SP in this material. This material was found to have a high resistivity and good
radiation spectrometer performance. It had SPs that were rich in calcium (Ca), carbon (C) and oxygen (O) (possibly
CaCO3) or only C and O that were 5 m or less in diameter.
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Details
- Title
- Characterization of secondary phases and other defects in CdZnTe
- Creators
- Martine C Duff - Savannah River National Lab. (United States)Kelvin G Lynn - Washington State Univ. (United States)Kelly Jones - Washington State Univ. (United States)Rajeswari Soundararajan - Washington State Univ. (United States)John P Bradley - Lawrence Livermore National Lab. (United States)Hope Ishii - Lawrence Livermore National Lab. (United States)Jeffery Aguiar - Lawrence Livermore National Lab. (United States)Penny Wozniakiewicz - Lawrence Livermore National Lab. (United States)
- Publication Details
- Proceedings of SPIE, Vol.7805(1), pp.780503-7805017
- Conference
- Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII
- Identifiers
- 99900547573301842
- Language
- English
- Resource Type
- Conference proceeding