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Title: Evaluation of CZT crystals from the former Soviet Union

Abstract

Vertical high pressure Bridgman (VHPB) Cd{sub 1{minus}x}Zn{sub x}Te (0.04 < x < 0.24) detector crystals grown in the Ukraine and Russia have been evaluated and compared to US-grown materials. Various analytical techniques were used to study the materials for trace impurities, precipitates, crystallinity, and electrical transport properties. Relatively high concentrations of carbon and trace impurities such as Se, Nd and Si have been detected in the crystals. In most cases, the crystals showed lower resistivity than US-grown CZT. However, recent crystals grown in Russia exhibited better detector performance than those grown in prior years, and good response to an {sup 241}Am radioactive source was found. Electron lifetimes below 1 {micro}s were measured in crystals having significant numbers of micro-defects, compared to lifetimes of 5--15 {micro}s found in spectrometer grade materials produced in the US. Furthermore, the zinc composition along the growth axis showed better homogeneity in comparison with the US material.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
755948
Report Number(s):
SAND2000-8609C
TRN: US0003794
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Conference on Room Temperature Semi Conductor Detectors for Remote Portable and In-Situ Radiation Measurement Systems, Jerusalem (IL), 01/26/1998--01/29/1998; Other Information: PBD: 26 Jan 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SEMICONDUCTOR DETECTORS; CADMIUM TELLURIDES; ZINC TELLURIDES; AMBIENT TEMPERATURE; BRIDGMAN METHOD; MICROSTRUCTURE; CRYSTAL STRUCTURE; ELECTRICAL PROPERTIES; GAMMA SPECTROMETERS

Citation Formats

Hermon, H, Schieber, M, James, R B, Antolak, A J, Morse, D H, Brunett, B, Hackett, C, Tarver, E, Komar, V, Goorsky, M S, Yoon, H, Kolesnikov, N N, Toney, J, and Schlesinger, T E. Evaluation of CZT crystals from the former Soviet Union. United States: N. p., 1998. Web.
Hermon, H, Schieber, M, James, R B, Antolak, A J, Morse, D H, Brunett, B, Hackett, C, Tarver, E, Komar, V, Goorsky, M S, Yoon, H, Kolesnikov, N N, Toney, J, & Schlesinger, T E. Evaluation of CZT crystals from the former Soviet Union. United States.
Hermon, H, Schieber, M, James, R B, Antolak, A J, Morse, D H, Brunett, B, Hackett, C, Tarver, E, Komar, V, Goorsky, M S, Yoon, H, Kolesnikov, N N, Toney, J, and Schlesinger, T E. Mon . "Evaluation of CZT crystals from the former Soviet Union". United States.
@article{osti_755948,
title = {Evaluation of CZT crystals from the former Soviet Union},
author = {Hermon, H and Schieber, M and James, R B and Antolak, A J and Morse, D H and Brunett, B and Hackett, C and Tarver, E and Komar, V and Goorsky, M S and Yoon, H and Kolesnikov, N N and Toney, J and Schlesinger, T E},
abstractNote = {Vertical high pressure Bridgman (VHPB) Cd{sub 1{minus}x}Zn{sub x}Te (0.04 < x < 0.24) detector crystals grown in the Ukraine and Russia have been evaluated and compared to US-grown materials. Various analytical techniques were used to study the materials for trace impurities, precipitates, crystallinity, and electrical transport properties. Relatively high concentrations of carbon and trace impurities such as Se, Nd and Si have been detected in the crystals. In most cases, the crystals showed lower resistivity than US-grown CZT. However, recent crystals grown in Russia exhibited better detector performance than those grown in prior years, and good response to an {sup 241}Am radioactive source was found. Electron lifetimes below 1 {micro}s were measured in crystals having significant numbers of micro-defects, compared to lifetimes of 5--15 {micro}s found in spectrometer grade materials produced in the US. Furthermore, the zinc composition along the growth axis showed better homogeneity in comparison with the US material.},
doi = {},
url = {https://www.osti.gov/biblio/755948}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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