Výsledky vyhledávání

Three-dimensional X-ray fluorescence imaging modes for biological specimens using a full-field energy dispersive CCD camera

Autor: Heinrich Riesemeier, Gerald Falkenberg, G. Buzanich, Martin Radtke, Jan Garrevoet, Colin R. Janssen, Karel A.C. De Schamphelaere, Laszlo Vincze, Uwe Reinholz, Pieter Tack, Oliver Scharf, Roel Evens, Björn De Samber

Publikováno v: Journal of analytical atomic spectrometry 34, 2083-2093 (2019). doi:10.1039/C9JA00198K
Journal of Analytical Atomic Spectrometry

Besides conventional scanning X-ray fluorescence imaging at synchrotron sources, full-field X-ray fluorescence (FF-XRF) imaging techniques that do not implicitly require spatial scanning of the sample have become available. FF-XRF has become achievab

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5eba29db93a9c056242883f83a1380f2
https://doi.org/10.1039/c9ja00198k

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Observation of X-ray shadings in synchrotron radiation-total reflection X-ray fluorescence using a color X-ray camera

Autor: Ursula E. A. Fittschen, Velma Lopez, George J. Havrilla, Uwe Reinholz, Oliver Scharf, G. Buzanich, Kathryn G. McIntosh, Martin Radtke, Magnus Menzel, Christina Streli

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 99:179-184

Absorption effects and the impact of specimen shape on TXRF analysis has been discussed intensively. Model calculations indicated that ring shaped specimens should give better results in terms of higher counts per mass signals than filled rectangle o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53dfc853463f8540270bb628d471379a
https://doi.org/10.1016/j.sab.2014.06.025

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Focusing systems for the generation of X-ray micro beam: An overview

Autor: G. Buzanich, Maria Luísa Carvalho, A. Guilherme

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 77:1-8

This manuscript reviews the most used optical systems for X-ray microprobes and summarizes the experiences in research with synchrotron radiation as well as with X-ray tube generators. The need for smaller beam spot sizes for various applications and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::19985f701621764f2faad2c4c119dc8e
https://doi.org/10.1016/j.sab.2012.07.021

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A new pnCCD-based color X-ray camera for fast spatial and energy-resolved measurements

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 654:250-257

We present a new high resolution X-ray imager based on a pnCCD detector and a polycapillary optics. The properties of the pnCCD like high quantum efficiency, high energy resolution and radiation hardness are maintained, while color corrected polycapi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::067b432240b20402f87e25ec4a0d6488
https://doi.org/10.1016/j.nima.2011.05.080

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Compact pnCCD-Based X-ray Camera with High Spatial and Energy Resolution: A Color X-ray Camera

Publikováno v: Analytical Chemistry. 83:2532-2538

For many applications there is a requirement for nondestructive analytical investigation of the elemental distribution in a sample. With the improvement of X-ray optics and spectroscopic X-ray imagers, full field X-ray fluorescence (FF-XRF) methods a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba06a4b1c6f52326c9c92847b6ca7aa7
https://doi.org/10.1021/ac102811p

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PART II (Portable ART analyzer)-development of a XRF spectrometer adapted for the study of artworks in the Kunsthistorisches Museum, Vienna

Autor: G. Buzanich, D. Wegrzynek, Andrzej Markowicz, Peter Wobrauschek, Christina Streli, Katharina Uhlir, E. Chinea-Cano, Martina Griesser

Publikováno v: X-Ray Spectrometry. 39:98-102

A portable focused-beam X-ray fluorescence (XRF) spectrometer was designed and manufactured taking into account a huge variation in material, size and shape of museum objects. The spectrometer is equipped with a vacuum chamber enclosed with a Kapton-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b7ef3df0b254deb3d4cc92e140bd207f
https://doi.org/10.1002/xrs.1231

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μ-SRXRF characterization of Brazilian emeralds

Autor: Heinrich Riesemeier, Uwe Reinholz, Martin Radtke, R A S Guttler, G. Buzanich, Marcia de Almeida Rizzutto, J.F. Curado

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

The aim of the present study is to characterize emeralds from different mines of Brazil by using Synchrotron Radiation X-ray Fluorescence Microanalysis (μ-SRXRF). The advantage of this technique is that we can analyze a homogeneous, inclusion free a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fed7ec74e094eab4073011f61472f5a

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The SLcam: A full-field energy dispersive X-ray camera

Autor: A. Bjeoumikhov, R. Wedell, I. Ordavo, Heinrich Riesemeier, H. Soltau, Uwe Reinholz, N. Langhoff, Martin Radtke, Oliver Scharf, G. Buzanich

The color X-ray camera (SLcam) is a full-field single photon imager. As stand-alone camera, it is applicable for energy and space-resolved X-ray detection measurements. The exchangeable poly-capillary optics in front of a beryllium entrance window co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32bf81f7c4bb0746024b812ba79b1689

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