Performance of a large volume 20 ×20× 15 mm 3 CPG detector

A. E. Bolotnikov; S. Babalola; G. S. Camarda; Y. Cui; S. U. Egarievwe; R. Gul; A. Hossain; K. Hyun Kim; D. R. Mayo; M. K. Smith; G. Yang; R. B. James

doi:10.1109/TNS.2011.2167984

Performance of a large volume 20 ×20× 15 mm ³ CPG detector

A. E. Bolotnikov, S. Babalola, G. S. Camarda, Y. Cui, S. U. Egarievwe, R. Gul, A. Hossain, K. Hyun Kim, D. R. Mayo, M. K. Smith, G. Yang, R. B. James

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Large-volume CdZnTe (CZT) single crystals with electron lifetimes exceeding 10 μs recently became available commercially for making large effective area gamma-ray arrays. However, significant variations were observed in the performance of detectors made from such arrays. We evaluated the spectroscopic performance of such a large-volume, 20 × 20×15 mm ³, coplanar-grid (CPG) CdZnTe detector, intended for use in a handheld radioisotope-identifier, which unexpectedly showed a poor spectral performance with an energy resolution of 3.5-4% FWHM measured with 662-keV gamma-rays. To understand the factors affecting its performance, we applied several characterization techniques, viz., white X-ray diffraction topography measurements, IR microscopy, and micron-spatial resolution X-ray mapping. They allowed us to identify major crystal defects in the device that limit its energy resolution and detection efficiency.

Original language	English
Article number	6043886
Pages (from-to)	3167-3171
Number of pages	5
Journal	IEEE Transactions on Nuclear Science
Volume	58
Issue number	6 PART 2
DOIs	https://doi.org/10.1109/TNS.2011.2167984
Publication status	Published - 2011 Dec
Externally published	Yes

Keywords

CdZnTe
crystal defects
radiation detectors

ASJC Scopus subject areas

Nuclear and High Energy Physics
Nuclear Energy and Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/TNS.2011.2167984

Cite this

@article{79efc8bb5b294f598baf3b16d468f082,

title = "Performance of a large volume 20 ×20× 15 mm 3 CPG detector",

abstract = "Large-volume CdZnTe (CZT) single crystals with electron lifetimes exceeding 10 μs recently became available commercially for making large effective area gamma-ray arrays. However, significant variations were observed in the performance of detectors made from such arrays. We evaluated the spectroscopic performance of such a large-volume, 20 × 20×15 mm 3, coplanar-grid (CPG) CdZnTe detector, intended for use in a handheld radioisotope-identifier, which unexpectedly showed a poor spectral performance with an energy resolution of 3.5-4% FWHM measured with 662-keV gamma-rays. To understand the factors affecting its performance, we applied several characterization techniques, viz., white X-ray diffraction topography measurements, IR microscopy, and micron-spatial resolution X-ray mapping. They allowed us to identify major crystal defects in the device that limit its energy resolution and detection efficiency.",

keywords = "CdZnTe, crystal defects, radiation detectors",

author = "Bolotnikov, {A. E.} and S. Babalola and Camarda, {G. S.} and Y. Cui and Egarievwe, {S. U.} and R. Gul and A. Hossain and Kim, {K. Hyun} and Mayo, {D. R.} and Smith, {M. K.} and G. Yang and James, {R. B.}",

note = "Funding Information: Manuscript received December 17, 2010; revised June 16, 2011; accepted August 31, 2011. Date of publication October 13, 2011; date of current version December 14, 2011. This work was supported by the U.S. Department of Energy, Office of Nonproliferation Research and Development, NA-22 and Defense Threat Reduction Agency. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH1-886 with the U.S. Department of Energy.",

year = "2011",

month = dec,

doi = "10.1109/TNS.2011.2167984",

language = "English",

volume = "58",

pages = "3167--3171",

journal = "IEEE Transactions on Nuclear Science",

issn = "0018-9499",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "6 PART 2",

}

TY - JOUR

T1 - Performance of a large volume 20 ×20× 15 mm 3 CPG detector

AU - Bolotnikov, A. E.

AU - Babalola, S.

AU - Camarda, G. S.

AU - Cui, Y.

AU - Egarievwe, S. U.

AU - Gul, R.

AU - Hossain, A.

AU - Kim, K. Hyun

AU - Mayo, D. R.

AU - Smith, M. K.

AU - Yang, G.

AU - James, R. B.

N1 - Funding Information: Manuscript received December 17, 2010; revised June 16, 2011; accepted August 31, 2011. Date of publication October 13, 2011; date of current version December 14, 2011. This work was supported by the U.S. Department of Energy, Office of Nonproliferation Research and Development, NA-22 and Defense Threat Reduction Agency. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH1-886 with the U.S. Department of Energy.

PY - 2011/12

Y1 - 2011/12

N2 - Large-volume CdZnTe (CZT) single crystals with electron lifetimes exceeding 10 μs recently became available commercially for making large effective area gamma-ray arrays. However, significant variations were observed in the performance of detectors made from such arrays. We evaluated the spectroscopic performance of such a large-volume, 20 × 20×15 mm 3, coplanar-grid (CPG) CdZnTe detector, intended for use in a handheld radioisotope-identifier, which unexpectedly showed a poor spectral performance with an energy resolution of 3.5-4% FWHM measured with 662-keV gamma-rays. To understand the factors affecting its performance, we applied several characterization techniques, viz., white X-ray diffraction topography measurements, IR microscopy, and micron-spatial resolution X-ray mapping. They allowed us to identify major crystal defects in the device that limit its energy resolution and detection efficiency.

AB - Large-volume CdZnTe (CZT) single crystals with electron lifetimes exceeding 10 μs recently became available commercially for making large effective area gamma-ray arrays. However, significant variations were observed in the performance of detectors made from such arrays. We evaluated the spectroscopic performance of such a large-volume, 20 × 20×15 mm 3, coplanar-grid (CPG) CdZnTe detector, intended for use in a handheld radioisotope-identifier, which unexpectedly showed a poor spectral performance with an energy resolution of 3.5-4% FWHM measured with 662-keV gamma-rays. To understand the factors affecting its performance, we applied several characterization techniques, viz., white X-ray diffraction topography measurements, IR microscopy, and micron-spatial resolution X-ray mapping. They allowed us to identify major crystal defects in the device that limit its energy resolution and detection efficiency.

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