Search results for "Beni culturali"
showing 10 items of 1017 documents
Ballistic Deficit Pulse Processing in Cadmium-Zinc-Telluride Pixel Detectors for High-Flux X-ray Measurements.
2022
High-flux X-ray measurements with high-energy resolution and high throughput require the mitigation of pile-up and dead time effects. The reduction of the time width of the shaped pulses is a key approach, taking into account the distortions from the ballistic deficit, non-linearity, and time instabilities. In this work, we will present the performance of cadmium–zinc–telluride (CdZnTe or CZT) pixel detectors equipped with digital shapers faster than the preamplifier peaking times (ballistic deficit pulse processing). The effects on energy resolution, throughput, energy-linearity, time stability, charge sharing, and pile-up are shown. The results highlight the absence of time instabilities …
High-Z Materials for X-ray Detection: Material Properties and Characterization Techniques
2023
This book will provide readers with a good overview of some of most recent advances in the field of High-Z materials. There will be a good mixture of general chapters in both technology and applications in opto-electronics, X-ray detection and emerging optoelectronics applications. The book will have an in-depth review of the research topics from world-leading specialists in the field.
CDTE AND CDZNTE PIXEL DETECTORS FOR X-RAY SPECTROSCOPIC IMAGING
2012
Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) wide band gap semiconductors for x-ray detectors have experienced a rather rapid development in the last few years. Among the traditional x-ray detectors based on silicon (Si) and germanium (Ge), CdTe and CdZnTe detectors show higher detection efficiency at high energies and good room temperature performance and are well suited for the development of compact detection systems and pixel arrays for simultaneous measurements of photon interaction position and energy. This chapter is an introduction to the physics and the technology of CdTe and CdZnTe pixel detectors for x-ray spectroscopy and imaging. The physical properties of CdTe …
Time-dependent current-voltage characteristics of Al/p-CdTe/Pt x-ray detectors
2012
Current-voltage (I-V) characteristics of Schottky Al/p-CdTe/Pt detectors were investigated in dark and at different temperatures. CdTe detectors with Al rectifying contacts, very appealing for high resolution x-ray and gamma ray spectroscopy, suffer from bias-induced polarization phenomena which cause current increasing with the time and severe worsening of the spectroscopic performance. In this work, we studied the time-dependence of the I-V characteristics of the detectors, both in reverse and forward bias, taking into account the polarization effects. The I-V measurements, performed at different time intervals between the application of the bias voltage and the measurement of the current…
Integrated characterization study of building materials in the greek roman theatre of Taormina
2009
Mural salts characterization of "Penitenziati" mural paintings in Chiaramonte Palace (Palermo)
2009
Integrated methodologies for qualitative and quantitative characterization of historical pigments
2014
XRF ANALYSES ON MOSAIC TESSERAE OF THE PALATINE CHAPEL OF PALERMO
2020
Laboratory of X-ray Fluorescence (XRF)
2020
In this laboratory activity, the X-ray Fluorescence Spectroscopy technique is introduced. The goal of the laboratory is to show to the students the theory and the applications of the above technique in the field of underwater archaeology. After a brief introduction about the theory and the instrumentations, some case studies are showed. The students thus see the practice application of the portable XRF Tracer III SD Bruker AXS spectrometer having a Rhodium tube as an X-ray generator and a silicon drift XFlash ® with Peltier cooling system as a detector to some finds saved at the Museo Archeologico Antiquarium ex Stabilimento Florio delle tonnare di Favignana e Formica. The identification of…