Results 141 to 150 of about 36,967 (295)

Design and Use of Portable X-ray Fluorescence Devices for the Analysis of Heritage Materials

Condensed Matter
X-ray fluorescence (XRF) is a successful technique often used for the elemental analysis of cultural heritage artefacts. It is non-invasive, the equipment can be miniaturized and made portable and it allows addressing crucial issues such as the ...
Maurizio Chiti, Daniele Chiti, Federico Chiarelli, Raffaella Donghia, Adolfo Esposito, Marco Ferretti, Astrik Gorghinian   +6 more
doaj   +1 more source

Integrated X‐Ray, Gamma Radiation, and Micro‐CT Techniques for Quantitative Wood Characterization

X-Ray Spectrometry, EarlyView.
ABSTRACT The present research integrates microcomputed tomography (micro‐CT), x‐ray fluorescence, and gamma‐ray transmission to quantitatively characterize wood species. A total of 22 samples from seven species were analyzed for density (ρ), linear attenuation coefficient (μ), Compton scattering, micro‐CT gray values (GV), porosity, mass attenuation ...
Roberta M. S. P. Borges, Josiane E. Cavalcante, Isis V. N. S. Franzi, Anderson G. Paula, Roberta G. Leitão, Marcelino José dos Anjos, Ricardo T. Lopes, Davi F. Oliveira   +7 more
wiley   +1 more source

Application of X-Ray Fluorescence Analysis in Investigations of Historical Monuments

Acta Polytechnica, 2005
Nuclear techniques and other techniques using ionising radiation represent a valuable tool in non-destructive diagnostics applied to archaeological finds and objects of arts, namely for determining the composition of materials used in the production of ...
T. Čechák, L. Musílek, T. Trojek, I. Kopecká   +3 more
doaj  

Comparison of Algorithms for Baseline Correction of LIBS Spectra for Quantifying Total Carbon in Brazilian Soils

, 2018
LIBS is a promising and versatile technique for multi-element analysis that usually takes less than a minute and requires minimal sample preparation and no reagents.
Boas, Paulino Ribeiro Villas, Franco, Marco Aurélio de Menezes, Milori, Débora Marcondes Bastos Pereira   +2 more
core  

Absolute Calibration of the Auger Fluorescence Detectors [PDF]

, 2005
Absolute calibration of the Pierre Auger Observatory fluorescence detectors uses a light source at the telescope aperture. The technique accounts for the ombined effects of all detector components in a single measurement.
A C Rovero, A C Rovero, A Tamashiro, D Warner, J Brack, J Harton, L Garrard, P Bauleo, R Knapik, R Meyhandan   +9 more
core   +1 more source

Sum Peaks in a Total Reflection X‐Ray Fluorescence Spectrum of the Dry Residue of a Solution Sample Containing Ca

X-Ray Spectrometry, EarlyView.
ABSTRACT In this study, sum peaks related to the Ca Kα line (3.69 keV) were observed in total reflection X‐ray fluorescence spectra of dry residues of a solution sample containing a large amount of Ca, which were measured with a silicon drift detector. When dry residues containing 1 μg of Ca were measured, a peak that would be the sum peak of the Si Kα
Yume Kubota, Masahide Wada, Kosei Oikawa, Yusaku Oki, Shinsuke Kunimura   +4 more
wiley   +1 more source

Quality from Kent: Preliminary results from the analysis of fifth‐ to seventh‐century silver alloys

Archaeometry, EarlyView.
Abstract This paper explores early results from the chemical and lead isotope analysis of 30 silver‐alloy objects from southeast England dating between the fifth and seventh centuries CE, presenting limited aspects of the three main analyses that were conducted. First, a comparison of the results gained from surface x‐ray fluorescence (pXRF) values and
Toby F. Martin, Matthew J. Ponting
wiley   +1 more source

Portable X-ray Fluorescence as a Rapid Determination Tool to Detect Parts per Million Levels of Ni, Zn, As, Se, and Pb in Human Toenails: A South India Case Study. [PDF]

Environ Sci Technol, 2021
Bhatia M, Specht AJ, Ramya V, Sulaiman D, Konda M, Balcom P, Sunderland EM, Qureshi A.   +7 more
europepmc   +1 more source

Production of arsenical bronze using speiss on the Elephantine Island (Aswan, Egypt) during the Middle Kingdom (Middle Bronze Age) (c.2000–1650 BCE)

Archaeometry, EarlyView.
Abstract This paper presents the first direct evidence of the slags produced during the cementation alloying process of Cu with speiss inside ceramic crucibles, thus representing Cu alloying with As in Middle Kingdom Egypt. The settlement deposits from the Middle Bronze Age were excavated on Elephantine Island, within modern Aswan.
Jiří Kmošek, Martin Odler
wiley   +1 more source

The Provenance of Silver in the Viking‐Age Hoard From Bedale, North Yorkshire

Archaeometry, EarlyView.
ABSTRACT The acquisition of silver was a key motive propelling the Viking expansion out of Scandinavia; identifying the sources of Viking silver during the early part of the Viking Age can provide critical insights into the relative significance of western European and eastern, Islamic wealth in the Viking expansion.
Jane Kershaw, Stephen Merkel, Andrew Woods, Jane Evans, Vanessa Pashley, Simon Chenery   +5 more
wiley   +1 more source