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Title: Reduction of surface leakage current by surface passivation of CdZn Te and other materials using hyperthermal oxygen atoms

Abstract

Reduction of surface leakage current by surface passivation of Cd.sub.1-x Zn.sub.x Te and other materials using hyperthermal oxygen atoms. Surface effects are important in the performance of CdZnTe room-temperature radiation detectors used as spectrometers since the dark current is often dominated by surface leakage. A process using high-kinetic-energy, neutral oxygen atoms (.about.3 eV) to treat the surface of CdZnTe detectors at or near ambient temperatures is described. Improvements in detector performance include significantly reduced leakage current which results in lower detector noise and greater energy resolution for radiation measurements of gamma- and X-rays, thereby increasing the accuracy and sensitivity of measurements of radionuclides having complex gamma-ray spectra, including special nuclear materials.

Inventors:
 [1];  [1]
  1. Los Alamos, NM
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
873473
Patent Number(s):
US 6168967
Assignee:
Regents of University of California (Los Alamos, NM)
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
reduction; surface; leakage; current; passivation; cdzn; materials; hyperthermal; oxygen; atoms; cd; 1-x; zn; effects; performance; cdznte; room-temperature; radiation; detectors; spectrometers; dark; dominated; process; high-kinetic-energy; neutral; treat; near; ambient; temperatures; described; improvements; detector; significantly; reduced; results; noise; energy; resolution; measurements; gamma-; x-rays; increasing; accuracy; sensitivity; radionuclides; complex; gamma-ray; spectra; including; special; nuclear; surface passivation; significantly reduce; energy resolution; nuclear materials; surface leakage; ambient temperature; radiation detector; radiation detectors; significantly reduced; nuclear material; leakage current; oxygen atoms; ambient temperatures; special nuclear; near ambient; radiation measurements; reduced leakage; oxygen atom; dark current; detector performance; temperature radiation; hyperthermal oxygen; surface pass; radiation measurement; /438/148/

Citation Formats

Hoffbauer, Mark A, and Prettyman, Thomas H. Reduction of surface leakage current by surface passivation of CdZn Te and other materials using hyperthermal oxygen atoms. United States: N. p., 2001. Web.
Hoffbauer, Mark A, & Prettyman, Thomas H. Reduction of surface leakage current by surface passivation of CdZn Te and other materials using hyperthermal oxygen atoms. United States.
Hoffbauer, Mark A, and Prettyman, Thomas H. 2001. "Reduction of surface leakage current by surface passivation of CdZn Te and other materials using hyperthermal oxygen atoms". United States. https://www.osti.gov/servlets/purl/873473.
@article{osti_873473,
title = {Reduction of surface leakage current by surface passivation of CdZn Te and other materials using hyperthermal oxygen atoms},
author = {Hoffbauer, Mark A and Prettyman, Thomas H},
abstractNote = {Reduction of surface leakage current by surface passivation of Cd.sub.1-x Zn.sub.x Te and other materials using hyperthermal oxygen atoms. Surface effects are important in the performance of CdZnTe room-temperature radiation detectors used as spectrometers since the dark current is often dominated by surface leakage. A process using high-kinetic-energy, neutral oxygen atoms (.about.3 eV) to treat the surface of CdZnTe detectors at or near ambient temperatures is described. Improvements in detector performance include significantly reduced leakage current which results in lower detector noise and greater energy resolution for radiation measurements of gamma- and X-rays, thereby increasing the accuracy and sensitivity of measurements of radionuclides having complex gamma-ray spectra, including special nuclear materials.},
doi = {},
url = {https://www.osti.gov/biblio/873473}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}