Investigation of the asymmetric characteristics and temperature effects of CdZnTe detectors

The results of our newest depth sensing coplanar grid CdZnTe detectors will be discussed. These detectors, which utilize the third-generation coplanar anode design, were fabricated by Baltic Scientific Instruments, Ltd., using crystals acquired from Yinnel Tech, Inc., having dimensions of 1.5 cm /sp...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on nuclear science 2005-10, Vol.52 (5), p.2068-2075
Main Authors: Sturm, B.W., Zhong He, Zurbuchen, T.H., Koehn, P.L.
Format: Article
Language:English
Subjects:
Anodes
Asymmetry
Cadmium zinc tellurides
CdZnTe detector
coplanar grid
Crystals
depth sensing
Detectors
Energy resolution
Gamma rays
gamma-ray spectroscopy
Instruments
Loss measurement
Orientation
Performance loss
Spectra
Spectroscopy
Temperature sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The results of our newest depth sensing coplanar grid CdZnTe detectors will be discussed. These detectors, which utilize the third-generation coplanar anode design, were fabricated by Baltic Scientific Instruments, Ltd., using crystals acquired from Yinnel Tech, Inc., having dimensions of 1.5 cm /spl times/1.5cm/spl times/ 0.9 cm and 1.5 cm /spl times/ 1.5cm /spl times/ 0.95 cm. Employing various compensation techniques, an energy resolution of about 1.7% full width at half maximum (FWHM) was achieved for 662-keV gamma rays. We observed that the spectral performance was highly dependent upon the biasing orientation of the detector. The /spl mu//sub e//spl tau//sub e/ product for one of the crystals was measured and it was found to be a high value of 1.13 /spl times/ 10/sup -2/ cm/sup 2//V. A study of the spectroscopic performance of CdZnTe for reduced temperature operation was implemented and we observed degraded performance for temperatures below 0/spl deg/C and a complete loss of spectral information at -30/spl deg/C.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2005.856728