X-ray and gamma-ray spectroscopy with segmented CdZnTe detectors

A. Shor; Yossi Eisen; Israel D. Mardor

doi:10.1117/12.363692

1 October 1999 X-ray and gamma-ray spectroscopy with segmented CdZnTe detectors

A. Shor, Yossi Eisen, Israel D. Mardor

Proceedings Volume 3769, Penetrating Radiation Systems and Applications; (1999) https://doi.org/10.1117/12.363692
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Two methods are presented for obtaining excellent spectroscopic performance and good photo-peak efficiencies for CdZnTe coarsely segmented pad and strip detectors. The `correlation method' utilizes the correlation between the signals in the planar and segmented electrodes. This correlation provides an indication of the point of interaction. Application of a correction which is based on this correlation generates spectra with a resolution of 1.4% FWHM at 356 keV for pad detectors. Furthermore, for strip detectors this method yields improved spectra and an increase of more than 35% in photo-peak efficiencies at 140.5 keV. The `compensation method' involves tuning the degree of electron trapping to compensate for the almost completely trapped holes. Contrary to planar detectors, for segmented detectors the compensation condition yields induced charge signals which are 80% of the maximum signal. Using this method we obtained a spectrum with energy resolution of 3.5% FWHM at 122 keV and a peak-to-valley ratio of approximately 100:1.

Citation Download Citation

A. Shor, Yossi Eisen, and Israel D. Mardor "X-ray and gamma-ray spectroscopy with segmented CdZnTe detectors", Proc. SPIE 3769, Penetrating Radiation Systems and Applications, (1 October 1999); https://doi.org/10.1117/12.363692

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