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Title: High-resolution virtual Frisch grid gamma-ray detectors based on as-grown CdZnTeSe with reduced defects

Abstract

X- and gamma-ray detectors arequickly becoming essential tools for science and technology in various fields. These detectors offer broad applications such as homeland security, nonproliferation, nuclear security, medical imaging, astrophysics, and high energy physics. All these applications necessitate high-resolution detectors operable at room temperature and available at a reasonable cost. CdZnTe (CZT) is the material of choice for this purpose; however, the material still suffers from intrinsic defects such as highly decorated subgrain boundary networks and a high concentration of secondary phases. These defects not only hinder the charge transport but also create a spatial inhomogeneity in the charge transport properties, subsequently causing substantial degradation in detector response particularly for relatively thick (>1 cm) detectors. Some of the material deficiencies suffered by CZT have been addressed by adding selenium into the CZT matrix. Selenium was found to be very effective in producing material that is principally free from a subgrain boundary network with the occasional appearance of subgrain boundaries with reduced secondary phases decorating these boundaries. The resulting quaternary compound CdZnTeSe (CZTS) reflected excellent material quality mitigating some major deficiencies suffered by CZT. Virtual Frisch grid detectors were fabricated from the as-grown CZTS ingots, and they demonstrated high resolution spectroscopicmore » grade. The excellent CZTS material contained very low defects and was found to potentially increase the yield of high-quality detectors as compared to CZT.« less

Authors:
ORCiD logo [1];  [1];  [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20); USDOE Office of Environmental Management (EM)
OSTI Identifier:
1547366
Alternate Identifier(s):
OSTI ID: 1561206
Report Number(s):
SRNL-STI-2019-00260
Journal ID: ISSN 0003-6951
Grant/Contract Number:  
SC0012704; AC09-08SR22470
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 23; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Roy, Utpal N., Camarda, Giuseppe S., Cui, Yonggang, and James, Ralph B. High-resolution virtual Frisch grid gamma-ray detectors based on as-grown CdZnTeSe with reduced defects. United States: N. p., 2019. Web. doi:10.1063/1.5109119.
Roy, Utpal N., Camarda, Giuseppe S., Cui, Yonggang, & James, Ralph B. High-resolution virtual Frisch grid gamma-ray detectors based on as-grown CdZnTeSe with reduced defects. United States. doi:10.1063/1.5109119.
Roy, Utpal N., Camarda, Giuseppe S., Cui, Yonggang, and James, Ralph B. Fri . "High-resolution virtual Frisch grid gamma-ray detectors based on as-grown CdZnTeSe with reduced defects". United States. doi:10.1063/1.5109119.
@article{osti_1547366,
title = {High-resolution virtual Frisch grid gamma-ray detectors based on as-grown CdZnTeSe with reduced defects},
author = {Roy, Utpal N. and Camarda, Giuseppe S. and Cui, Yonggang and James, Ralph B.},
abstractNote = {X- and gamma-ray detectors arequickly becoming essential tools for science and technology in various fields. These detectors offer broad applications such as homeland security, nonproliferation, nuclear security, medical imaging, astrophysics, and high energy physics. All these applications necessitate high-resolution detectors operable at room temperature and available at a reasonable cost. CdZnTe (CZT) is the material of choice for this purpose; however, the material still suffers from intrinsic defects such as highly decorated subgrain boundary networks and a high concentration of secondary phases. These defects not only hinder the charge transport but also create a spatial inhomogeneity in the charge transport properties, subsequently causing substantial degradation in detector response particularly for relatively thick (>1 cm) detectors. Some of the material deficiencies suffered by CZT have been addressed by adding selenium into the CZT matrix. Selenium was found to be very effective in producing material that is principally free from a subgrain boundary network with the occasional appearance of subgrain boundaries with reduced secondary phases decorating these boundaries. The resulting quaternary compound CdZnTeSe (CZTS) reflected excellent material quality mitigating some major deficiencies suffered by CZT. Virtual Frisch grid detectors were fabricated from the as-grown CZTS ingots, and they demonstrated high resolution spectroscopic grade. The excellent CZTS material contained very low defects and was found to potentially increase the yield of high-quality detectors as compared to CZT.},
doi = {10.1063/1.5109119},
journal = {Applied Physics Letters},
number = 23,
volume = 114,
place = {United States},
year = {2019},
month = {6}
}

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