Results 21 to 30 of about 524,505 (250)
South African Journal of Science, 2014 Palaeomagnetic analysis indicates that Haasgat, a fossil-bearing palaeocave in the Gauteng Province of South Africa, is dominated by reversed magnetic polarity in its oldest, deepest layers and normal polarity in the younger layers.
Andy I.R. Herries +7 more
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Quantitative analysis by X ray fluorescence
Materiales de Construccion, 1966 Not ...
José Luis Sagrera
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Determination of chlorine in concretes by X ray fluorescence methods
Materiales de Construccion, 1967 Not ...
J. L. Sagrera, B. Bacle
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X-ray Fluorescence Computed Tomography (XFCT) Imaging with a Superfine Pencil Beam X-ray Source
Photonics, 2021 X-ray fluorescence computed tomography (XFCT) is a molecular imaging technique that can be used to sense different elements or nanoparticle (NP) agents inside deep samples or tissues. However, XFCT has not been a popular molecular imaging tool because it
Ignacio O. Romero +3 more
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Discovery of X-rays from Mars with Chandra [PDF]
, 2002 On 4 July 2001, X-rays from Mars were detected for the first time. The observation was performed with the ACIS-I detector onboard Chandra and yielded data of high spatial and temporal resolution, together with spectral information.
Cravens +26 more
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Journal of Radiation Research and Applied Sciences, 2018 The alloying effects on X-ray fluorescence (XRF) parameters such as K shell fluorescence cross-sections (σKα, σKβ and σK), K shell average fluorescence yields (ωK) and K to L shell vacancy transfer probabilities (ηKL) of V, Ti, Fe, Co and Ni 3d ...
Bünyamin Alım +3 more
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Speckle contrast of interfering fluorescence X-rays
Journal of Synchrotron Radiation, 2023 With the development of X-ray free-electron lasers (XFELs), producing pulses of femtosecond durations comparable with the coherence times of X-ray fluorescence, it has become possible to observe intensity–intensity correlations due to the interference of
Fabian Trost +14 more
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Optically detected X-ray absorption spectroscopy measurements as a means to monitor corrosion layers on copper [PDF]
, 2008 XANES and EXAFS information is conventionally measured in transmission through the energy-dependent absorption of X-rays or by observing X-ray fluorescence, but secondary fluorescence processes, such as the emission of electrons and optical photons (e.g.,
Adriaens, Mieke +5 more
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Influence of compression on soil characterization by X ray fluorescence
Semina: Ciências Exatas e Tecnológicas, 2018 The study of soil mineralogy has been highlighted in recent years, as well as the search for alternative analytical techniques for soil analysis. The classical methods for determination of total oxides in soil expose the analyst to chemical hazards and ...
Yasmin Vieira +4 more
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Chemical and Structural Analysis of Rocks Using X-ray Fluorescence and X-ray Diffraction Techniques
ARO-The Scientific Journal of Koya University, 2020 Rock examinations for mining and commercial use are a vital process to save money and time. A variety of methods and approaches have been used to analyze rocks and among them, X-ray fluorescence (XRF), and X-ray diffraction (XRD) techniques proved to be ...
Mohammed M. Sabri
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