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Title: Investigations of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection

Abstract

Cadmium manganese telluride (CMT) has high potential as a material for room-temperature nuclear-radiation detectors. We investigated indium-doped CMT crystals taken from the stable growth region of the ingot, and compared its characteristics with that from the last-to-freeze region. We employed different techniques, including synchrotron white-beam X-ray topography (SWBXT), current-voltage (I-V) measurements, and low-temperature photoluminescence spectra, and we also assessed their responses as detectors to irradiation exposure. The crystal from the stable growth region proved superior to that from the last-to-freeze region; it is a single-grain crystal, free of twins, and displayed a resistivity higher by two orders-of-magnitude. The segregation of indium dopant in the ingot might be responsible for its better resistivity. Furthermore, we recorded a good response in the detector fabricated from the crystal taken from the stable growth region; its ({mu}{tau}){sub e} value was 2.6 x 10{sup -3} cm{sup 2}/V, which is acceptable for thin detectors, including for applications in medicine.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
DOE - National Nuclear Security Administration
OSTI Identifier:
1013438
Report Number(s):
BNL-90850-2009-CP
NN2001000; TRN: US201110%%660
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 2009 U.S. Workshop on the Physics and Chemistry of II-VI Materials; Chicago, Illinois; 20091006 through 20091008
Country of Publication:
United States
Language:
English
Subject:
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; CADMIUM; CHEMISTRY; INDIUM; IRRADIATION; MANGANESE TELLURIDES; MEDICINE; PHOTOLUMINESCENCE; PHYSICS; RADIATION DETECTION; SEGREGATION; SPECTRA; SYNCHROTRONS; TOPOGRAPHY; CMT; synchrotron white-beam x-ray topography; photoluminescence spectra; detector response; twins

Citation Formats

Yang, G, Bolotnikov, A, Camarda, G, Cui, Y, Hossain, A, Kim, K, Carcelen, V, Gul, R, and James, R. Investigations of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection. United States: N. p., 2009. Web.
Yang, G, Bolotnikov, A, Camarda, G, Cui, Y, Hossain, A, Kim, K, Carcelen, V, Gul, R, & James, R. Investigations of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection. United States.
Yang, G, Bolotnikov, A, Camarda, G, Cui, Y, Hossain, A, Kim, K, Carcelen, V, Gul, R, and James, R. Tue . "Investigations of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection". United States. https://www.osti.gov/servlets/purl/1013438.
@article{osti_1013438,
title = {Investigations of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection},
author = {Yang, G and Bolotnikov, A and Camarda, G and Cui, Y and Hossain, A and Kim, K and Carcelen, V and Gul, R and James, R},
abstractNote = {Cadmium manganese telluride (CMT) has high potential as a material for room-temperature nuclear-radiation detectors. We investigated indium-doped CMT crystals taken from the stable growth region of the ingot, and compared its characteristics with that from the last-to-freeze region. We employed different techniques, including synchrotron white-beam X-ray topography (SWBXT), current-voltage (I-V) measurements, and low-temperature photoluminescence spectra, and we also assessed their responses as detectors to irradiation exposure. The crystal from the stable growth region proved superior to that from the last-to-freeze region; it is a single-grain crystal, free of twins, and displayed a resistivity higher by two orders-of-magnitude. The segregation of indium dopant in the ingot might be responsible for its better resistivity. Furthermore, we recorded a good response in the detector fabricated from the crystal taken from the stable growth region; its ({mu}{tau}){sub e} value was 2.6 x 10{sup -3} cm{sup 2}/V, which is acceptable for thin detectors, including for applications in medicine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {10}
}

Conference:
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