Thick CZT detectors for space-borne x-ray astronomy

被引：15

作者：

Krawczynski, H ^{[1
]}

Jung, I ^{[1
]}

Perkins, J ^{[1
]}

Burger, A ^{[1
]}

Groza, M ^{[1
]}

机构：

[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA

来源：

HARD X-RAY AND GAMMA-RAY DETECTOR PHYSICS VI | 2004年 / 5540卷

关键词：

C ZT; X-ray and Gamma-ray detectors; space-applications; contact technology;

D O I：

10.1117/12.558912

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Cadmium Zinc Telluride (CZT) detectors are having a major impact on the field of hard X-ray astronomy. Without the need for cryogenic cooling they achieve good spatial and energy resolutions over the broad energy range from 10 keV to similar to600 keV. In this paper, we briefly review the historical development of detectors used in Xray astronomy. Subsequently, we present an evaluation of CZT detectors from the company Imarad. The standard 2x2x0.5 cm detectors, contacted with 8x8 In pixels and an In cathode, exhibit FWHM energy resolutions of 7 keV at 59 keV, and 10 keV at 662 keV. A direct measurement of the 662 keV photopeak efficiency gives 67%. We have started a detailed study of the performance of Imarad detectors depending on surface preparation, contact materials, contact deposition, post-deposition detector annealing, and detector passivation techniques. We present first results from contacting detectors with Cr, Ag, Au, and Pt.

引用

页码：1 / 13

页数：13

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