X-ray irradiation effects on the trapping properties of Cd{sub 1-x}Zn{sub x}Te detectors

Journal Article · Sun Nov 01 00:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3253748· OSTI ID:21361908

Fraboni, B; Pasquini, L; Castaldini, A; Cavallini, A ^[1]; Siffert, P ^[2]

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1. Department of Physics, University of Bologna, viale Berti Pichat 6/2, Bologna 40127 (Italy)
2. EURORAD24 rue du Pont, Chennevieres/Marne 94430 (France)

CdZnTe-based detectors possess unique properties as room-temperature x- and gamma-ray detectors. We report on the effects of x-ray irradiation on CdZnTe and CdTe:Cl detectors with increasing x-ray doses. We correlate the 'macroscopic' performance of the detectors, investigated by gamma-ray spectroscopy to the 'microscopic' effects induced by the impinging radiation, i.e., the defective states introduced in the crystal lattice. The electrical activity of the defects and their activation energy have been investigated by photo induced current transient spectroscopy and by space charge limited current analyses. We identify the x-ray dose that induces a significant degradation in the detector performance, and by cross-correlating the results obtained, we achieve a reliable estimate of the actual concentration of electrically active deep states and assess the potentiality of these experimental methods as tools for quantitative analyses of high resistivity materials.

• OSTI ID: 21361908
• Journal Information: Journal of Applied Physics, Vol. 106, Issue 9; Other Information: DOI: 10.1063/1.3253748; (c) 2009 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTIVATION ENERGY
CADMIUM TELLURIDES
CHLORINE
CRYSTAL DEFECTS
CRYSTAL LATTICES
GAMMA DETECTION
GAMMA RADIATION
GAMMA SPECTRA
GAMMA SPECTROSCOPY
IRRADIATION
SEMICONDUCTOR MATERIALS
SPACE CHARGE
TEMPERATURE RANGE 0273-0400 K
X-RAY DETECTION
ZINC COMPOUNDS
CADMIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL STRUCTURE
DETECTION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
HALOGENS
IONIZING RADIATIONS
MATERIALS
NONMETALS
RADIATION DETECTION
RADIATIONS
SPECTRA
SPECTROSCOPY
TELLURIDES
TELLURIUM COMPOUNDS
TEMPERATURE RANGE