This article concerns the unusual storage mechanism in the x-ray storage phosphor CsBr:Eu2+. Data are presented and discussed regarding the identification of x-ray diffraction patterns and the photostimulated luminescence (PSL) intensity as a function of the annealing temperature for various Eu concentrations of CsBr:Eu2+ powder crystals and the spatial correlation of trapped electrons and holes. These results together with an analysis of previous literature data enable us to propose a model explaining the formation of phases which are active in the PSL-process of the CsBr:Eu2+ storage phosphor.

No abstract

Direct converting quantum counting detectors based on cadmium telluride and cadmium zinc telluride have been investigated with respect to their properties under intense X-ray irradiation. To derive a detailed picture of the performance of such detectors, the influence of the electric field, the detector thickness, the temperature and the intensity of the X-ray irradiation was studied. The results are discussed in terms of the "polarization" phenomenon, a reduction of the electric field strength inside the detector due to immobile charge carriers accumulating during irradiation. Furthermore, the impact of Te-inclusions and -precipitates is presented.

No abstract

No abstract