Mini Compton Camera Based on an Array of Virtual Frisch-Grid CdZnTe Detectors
We constructed a mini Compton camera based on an array of CdZnTe detectors and assessed its spectral and imaging properties. The entire array consisted of 6 ×6 Frisch-grid CdZnTe detectors, each with a size of 6 ×6 ×15 mm 3 . Since it is easier and more practical to grow small CdZnTe crystals rather...
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Published in | IEEE transactions on nuclear science Vol. 63; no. 1; pp. 259 - 265 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.02.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Institute of Electrical and Electronics Engineers (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | We constructed a mini Compton camera based on an array of CdZnTe detectors and assessed its spectral and imaging properties. The entire array consisted of 6 ×6 Frisch-grid CdZnTe detectors, each with a size of 6 ×6 ×15 mm 3 . Since it is easier and more practical to grow small CdZnTe crystals rather than large monolithic ones, constructing a mosaic array of parallelepiped crystals can be an effective way to build a more efficient, large-volume detector. With the fully operational CdZnTe array, we measured the energy spectra for 133 Ba -, 137 Cs -, 60 Co-radiation sources; we also located these sources using a Compton imaging approach. Although the Compton camera was small enough to hand-carry, its intrinsic efficiency was several orders higher than those generated in previous researches using spatially separated arrays, because our camera measured the interactions inside the CZT detector array, wherein the detector elements were positioned very close to each other. The performance of our camera was compared with that based on a pixelated detector. |
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Bibliography: | SC00112704; AC02-98CH10886 BNL-112201-2016-JA USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22) |
ISSN: | 0018-9499 1558-1578 |
DOI: | 10.1109/TNS.2015.2514120 |