Spectral Response of THM Grown CdZnTe Crystals

Author

Chen, H. ; Awadalla, S.A. ; Harris, F. ; Pinghe Lu ; Redden, R. ; Bindley, G. ; Copete, A. ; Hong, J. ; Grindlay, J. ; Amman, M. ; Lee, J.S. ; Luke, P. ; Kuvvetli, I. ; Budtz-Jorgensen, C.

Author_Institution

Redlen Technol., Sidney, BC

Volume

55

Issue

3

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1567

Lastpage

1572

Abstract

The spectral response of several crystals grown by the Traveling Heater Method (THM) were investigated. An energy resolution of 0.98% for a Pseudo Frisch-Grid of 4 times 4 times 9 mm³ and 2.1% FWHM for a coplanar-grid of size 11 times 11 times 5 mm³ were measured using ¹³⁷Cs-662 keV. In addition a 4% FWHM at 122 keV has also been measured on 20 times 20 X 5 mm³ monolithic pixellated devices. The material shows great potential toward producing large-volume detectors with spectral performance that meets the requirement for high-resolution gamma-ray spectroscopy.

Keywords

crystal growth; gamma-ray detection; gamma-ray spectroscopy; position sensitive particle detectors; radioactive sources; semiconductor counters; ¹³⁷Cs; CdZnTe crystals; FWHM; THM; coplanar-grid detectors; electron volt energy 122 keV; electron volt energy 662 keV; high-resolution gamma-ray spectroscopy; monolithic pixellated devices; pseudo Frisch-grid; traveling heater method; Crystals; Energy measurement; Energy resolution; Gamma ray detection; Gamma ray detectors; Semiconductor materials; Semiconductor radiation detectors; Size measurement; Spectroscopy; CZT; Coplanar-grid; THM; depth correction; gamma-ray;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2008.924089

Filename

4545082