True coincidence-summing corrections for the coincident γ-rays measured with coplanar grid CdZnTe detectors

H. Yücel; A. N. Solmaz; E. Köse; D. Bor

doi:10.1016/j.apradiso.2010.01.042

True coincidence-summing corrections for the coincident γ-rays measured with coplanar grid CdZnTe detectors

H. Yücel^*, A. N. Solmaz, E. Köse, D. Bor

^*Corresponding author for this work

Ankara University

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

6 Citations (Scopus)

Abstract

In this study, true coincidence-summing (TCS) correction factors have been measured for the sources ²²Na, ⁶⁰Co, ¹³³Ba and ¹⁵²Eu by use of three large volume coplanar grid CdZnTe (acronym: CZT) detectors. In case of a close-in detection geometry, two different TCS calculation algorithms were used to compute the required TCS correction factors. Both of the algorithms are based on the measured total-to-peak (TTP) ratio and full-energy peak (FEP) efficiency values that were obtained using almost "single" energy and coincidence-free nuclides. The results for TCS correction factors obtained by two different algorithms were agreeable to each other. The obtained TCS factors were ranged from about 7% to 30.5% in a 2250 mm³ CZT detector when a close counting geometry was used. For other two detectors with a volume of 1000 and 1687.5 mm³, the resulted TCS correction factors were relatively smaller and varied between about 0.1% and 20% at the close counting geometry condition. Therefore, the results indicate that there is a need for the estimation of TCS corrections in CZT detectors, especially when their crystal volumes are greater than 1 cm³ and these detectors are used in the case of a close-in detection geometry.

Original language	English
Pages (from-to)	1040-1048
Number of pages	9
Journal	Applied Radiation and Isotopes
Volume	68
Issue number	6
DOIs	https://doi.org/10.1016/j.apradiso.2010.01.042
Publication status	Published - Jun 2010
Externally published	Yes

Funding

This work was carried out within the framework of the project number DPT 2005 K 120130 supported by AU-INS, under the cooperation between Ankara University and Turkish Atomic Energy Authority. Authors are grateful to Dr S. Sudár from Institute of Experimental Physics, Kossuth University, Debrecen, Hungary and also grateful to Drs P. Dryák and P. Kovář from Czech Metrology Institute, Inspectorate for Ionizing Radiation, Radiová, Prague, Czech Republic for their kind permissions to use their programs. We also express our sincere gratitude to Prof. Dr. H. Y. GÖKSU from AU-INS her valuable comments.

Funders	Funder number
Ankara Universitesi
Türkiye Atom Enerjisi Kurumu

Keywords

CdZnTe (CZT) detector
Coplanar grid (CPG)
Disc source
Gamma-ray
True coincidence summing (TCS)

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10.1016/j.apradiso.2010.01.042

Cite this

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title = "True coincidence-summing corrections for the coincident γ-rays measured with coplanar grid CdZnTe detectors",

abstract = "In this study, true coincidence-summing (TCS) correction factors have been measured for the sources 22Na, 60Co, 133Ba and 152Eu by use of three large volume coplanar grid CdZnTe (acronym: CZT) detectors. In case of a close-in detection geometry, two different TCS calculation algorithms were used to compute the required TCS correction factors. Both of the algorithms are based on the measured total-to-peak (TTP) ratio and full-energy peak (FEP) efficiency values that were obtained using almost {"}single{"} energy and coincidence-free nuclides. The results for TCS correction factors obtained by two different algorithms were agreeable to each other. The obtained TCS factors were ranged from about 7\% to 30.5\% in a 2250 mm3 CZT detector when a close counting geometry was used. For other two detectors with a volume of 1000 and 1687.5 mm3, the resulted TCS correction factors were relatively smaller and varied between about 0.1\% and 20\% at the close counting geometry condition. Therefore, the results indicate that there is a need for the estimation of TCS corrections in CZT detectors, especially when their crystal volumes are greater than 1 cm3 and these detectors are used in the case of a close-in detection geometry.",

keywords = "CdZnTe (CZT) detector, Coplanar grid (CPG), Disc source, Gamma-ray, True coincidence summing (TCS)",

author = "H. Y{\"u}cel and Solmaz, \{A. N.\} and E. K{\"o}se and D. Bor",

year = "2010",

month = jun,

doi = "10.1016/j.apradiso.2010.01.042",

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pages = "1040--1048",

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T1 - True coincidence-summing corrections for the coincident γ-rays measured with coplanar grid CdZnTe detectors

AU - Yücel, H.

AU - Solmaz, A. N.

AU - Köse, E.

AU - Bor, D.

PY - 2010/6

Y1 - 2010/6

N2 - In this study, true coincidence-summing (TCS) correction factors have been measured for the sources 22Na, 60Co, 133Ba and 152Eu by use of three large volume coplanar grid CdZnTe (acronym: CZT) detectors. In case of a close-in detection geometry, two different TCS calculation algorithms were used to compute the required TCS correction factors. Both of the algorithms are based on the measured total-to-peak (TTP) ratio and full-energy peak (FEP) efficiency values that were obtained using almost "single" energy and coincidence-free nuclides. The results for TCS correction factors obtained by two different algorithms were agreeable to each other. The obtained TCS factors were ranged from about 7% to 30.5% in a 2250 mm3 CZT detector when a close counting geometry was used. For other two detectors with a volume of 1000 and 1687.5 mm3, the resulted TCS correction factors were relatively smaller and varied between about 0.1% and 20% at the close counting geometry condition. Therefore, the results indicate that there is a need for the estimation of TCS corrections in CZT detectors, especially when their crystal volumes are greater than 1 cm3 and these detectors are used in the case of a close-in detection geometry.

AB - In this study, true coincidence-summing (TCS) correction factors have been measured for the sources 22Na, 60Co, 133Ba and 152Eu by use of three large volume coplanar grid CdZnTe (acronym: CZT) detectors. In case of a close-in detection geometry, two different TCS calculation algorithms were used to compute the required TCS correction factors. Both of the algorithms are based on the measured total-to-peak (TTP) ratio and full-energy peak (FEP) efficiency values that were obtained using almost "single" energy and coincidence-free nuclides. The results for TCS correction factors obtained by two different algorithms were agreeable to each other. The obtained TCS factors were ranged from about 7% to 30.5% in a 2250 mm3 CZT detector when a close counting geometry was used. For other two detectors with a volume of 1000 and 1687.5 mm3, the resulted TCS correction factors were relatively smaller and varied between about 0.1% and 20% at the close counting geometry condition. Therefore, the results indicate that there is a need for the estimation of TCS corrections in CZT detectors, especially when their crystal volumes are greater than 1 cm3 and these detectors are used in the case of a close-in detection geometry.

KW - CdZnTe (CZT) detector

KW - Coplanar grid (CPG)

KW - Disc source

KW - Gamma-ray

KW - True coincidence summing (TCS)

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JO - Applied Radiation and Isotopes

JF - Applied Radiation and Isotopes

IS - 6

ER -

True coincidence-summing corrections for the coincident γ-rays measured with coplanar grid CdZnTe detectors

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