CdTe X/?-ray Detectors with Different Contact Materials

Dynamics of native oxide growth on CdTe and CdZnTe X-ray and gamma-ray detectors

We studied the growth of the surface oxide layer on four different CdTe and CdZnTe X-ray and gamma-ray detector-grade samples using spectroscopic ellipsometry. We observed gradual oxidization of CdTe and CdZnTe after chemical etching in bromine solutions. From X-ray photoelectron spectroscopy measurements, we found that the oxide consists only of oxygen bound to tellurium. We applied a refined ...

X-ray imaging detectors

LARGE-AREA CdTe PIXEL DETECTORS FOR HIGH-ENERGY X-RAY DIFFRACTION APPLICATIONS

Already a while ago researchers in pharmaceutical science have recognized hard X-rays as an useful analytical tool. Computed tomography techniques (CT) were utilized to investigate porosity and morphology of granules [1] and density variations within tablets [2]; real-time X-Ray Powder Diffraction (XRPD) techniques revealed reaction mechanisms and metastable phases of pharmaceutical cocrystals ...

New Perspectives of X-ray Techniques for Explosive Detection Based on CdTe/CdZnTe Spectrometric Detectors

Conventional explosive detection systems (EDS) based on X-ray technologies are using dual-energy radiography; they provide only a crude material characterization. Recently emerged semiconductors based X-ray detectors offer new capabilities in energy discrimination. This study is aiming at evaluating their interest for EDS. LETI-LDET laboratory has developed several pixellated CdTe/CZT detectors...

Electric Field and Current Transport Mechanisms in Schottky CdTe X-ray Detectors under Perturbing Optical Radiation

Schottky CdTe X-ray detectors exhibit excellent spectroscopic performance but suffer from instabilities. Hence it is of extreme relevance to investigate their electrical properties. A systematic study of the electric field distribution and the current flowing in such detectors under optical perturbations is presented here. The detector response is explored by varying experimental parameters, su...