X Ray Detectors
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Propiedades físicas y cristalinas del Cd1-xZnxTe (0 ≤ x ≤ 1)
ABSTRACT Cd1-xZnxTe (0 ≤ x ≤ 1) and ZnTe are II-VI semiconductors, which are used in single crystalline structure to improve their crystalline and electrical properties. The CZT and ZnTe must possess high crystalline and electrical quality to be used, the first in x or γ-ray detectors, and as substrates for suitable epitaxial films for detecting IR radi
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Desenvolvimento de um simulador para espectrometria por fluorescência de raios X usando computação distribuída / Development of a X-ray fluorescence spectrometry simulator using distributed computing
Radiation Physics is a branch of Physics that is present in various studying areas and relates to the concept of spectrometry. Among the numerous existing spectrometry techniques, there is the X-ray fluorescence spectrometry. It also has a range of variations which can emphasize a particular subset of techniques. The production of X-ray fluorescence enables
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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3. CARACTERIZAÇÃO DE DISPOSITIVOS ELETRÔNICOS PARA DOSIMETRIA EM TOMOGRAFIA COMPUTADORIZADA. / CHARACTERIZATION OF ELECTRONIC DEVICES FOR DOSIMETRY IN COMPUTED TOMOGRAPHY.
Computed tomography (CT) is an examination of high diagnostic capability that delivers high doses of radiation compared with other diagnostic radiological examinations. The current CT dosimetry is mainly made by using a 100 mm long ionization chamber. However, it was verified that this extension, which is intended to collect all scattered radiation of the si
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2012
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4. Desenvolvimento do cristal semicondutor de iodeto de mercúrio para aplicação como detector de radiação / Development of the mercury iodide semiconductor crystal for application as a radiation detector
In this work, the establishment of a technique for HgI growth and preparation of crystals, for use as room temperature radiation semiconductor detectors is described. Three methods of crystal growth were studied while developing this work: (1) Physical Vapor Transport (PVT); (2) Saturated Solution of HgI2, using two different solvents; (a) dimethyl sulfoxide
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2011
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5. Caracterização química elementar e identificação de fontes de obsidianas utilizando fluorescência de raios X com equipamento portátil (PXRF)
The study of archaeological and cultural heritage artifacts by means of analytical techniques with portable equipment has become increasingly routinely today. Various types of portable EDXRF equipment have been used in many different situations involving in situ analysis covering a wide range of geometries, detectors, current and voltage applied in the X-ray
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2010
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6. X-ray beam qualities for dental radiology purposes / PadronizaÃÃo de qualidade de feixes de raios-X para uso em radiologia odontolÃgica
In order to establish characteristics or properties of equipment for diagnostic radiology, e.g. ion chambers and semiconductor detectors, calibration laboratories offer a set of well-defined radiation conditions, called X-ray qualities, which can be used for many Physics studies and medical purposes. These X-ray qualities can be determined in terms of: (a) X
Publicado em: 2009
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7. X-ray beam qualities for dental radiology purposes / PadronizaÃÃo de qualidade de feixes de raios-X para uso em radiologia odontolÃgica
In order to establish characteristics or properties of equipment for diagnostic radiology, e.g. ion chambers and semiconductor detectors, calibration laboratories offer a set of well-defined radiation conditions, called X-ray qualities, which can be used for many Physics studies and medical purposes. These X-ray qualities can be determined in terms of: (a) X
Publicado em: 2009
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8. Avaliação dos efeitos da radiação ionizante em materiais utilizados em restaurações dentárias / EVALUATION OF EFFECTS OF IONIZING RADIATION ON MATERIALS USER IN DENTAL RESTORATIONS.
This work consisted of quantitative studies of the effects caused by ionizing radiation on materials used in dental restorations (Titanium, Amalgam, Resin Composite and Glass Ionomer) aiming the deleterious effects of radiotherapy when patients with tumors in head and neck, arising when the teeth are restored within in the field of radiation. Samples were su
Publicado em: 2009
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9. Projeto de um laboratório integrado de calibração de instrumentos no IPEN / PROJECT OF AN INTEGRATED CALIBRATION LABORATORY OF INSTRUMENTS AT IPEN
The Calibration Laboratory of Instruments of Instituto de Pesquisas Energéticas e Nucleares offers calibration services of radiation detectors used in radioprotection, diagnostic radiology and radiotherapy, for IPEN and for external facilities (public and private). One part of its facilities is located in the main building, along with other laboratories and
Publicado em: 2009
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10. Characterization of cadmium and zinc telluride (CZT) and pin type silicon (Si-Pin) photodiode detectors for x-ray spectrometry / Characterization of cadmium and zinc telluride (CZT) and pin type silicon (Si-Pin) photodiode detectors for x-ray spectrometry / CaracterizaÃÃo dos detectores de telureto de cÃdmio e zinco (CZT) e fotodiodo de silÃcio tipo pin (Si-PIN) para a espectrometria de raios-x / CaracterizaÃÃo dos detectores de telureto de cÃdmio e zinco (CZT) e fotodiodo de silÃcio tipo pin (Si-PIN) para a espectrometria de raios-x
A detailed understanding of X-ray spectrum is essential for analyzing equipment that emits this kind of radiation in radiodiagnostic facilities. Information on the various parameters that are contained in this spectrum is important for quality control of X-ray equipment. Spectrometry of X-ray beams uses very often GeHP detectors, that have good detection eff
Publicado em: 2008
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11. Simulações do ruído de fundo instrumental e reconstrução de imagens do experimento protoMIRAX / Simulations of the instrumental background and image reconstruction of the protoMIRAX experiment
In this thesis, the results of detailed and realistic simulations performed with a Monte Carlo simulation code for gamma-ray Astronomy (MGGPOD) to predict the response of protoMIRAX are presented. The protoMIRAX is a project under development by the High Energy Astrophysics group of INPE, in which a hard X-ray camera is being built based on the coded apertur
Publicado em: 2008
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12. 66Ga como padrão de calibração de raios de altas energias para detectores HPGe / Ga66 as a standard for high energy gamma rays
This work involves the study of the peak efficiency and response function of HPGe detectors for gamma rays in the energy range of 2 to 5 MeV, somewhat above the energy range of the available calibration sources for gamma spectroscopy. It is part of a high energy (up to 20MeV) -ray project to obtain intensity of rays from photo nuclear reactions produced with
Publicado em: 2008