Results 1 to 10 of about 1,034,226 (285)

X-Ray Spectroscopy of Stars [PDF]

open access: yesThe Astronomy and Astrophysics Review, 2009
(abridged) Non-degenerate stars of essentially all spectral classes are soft X-ray sources. Low-mass stars on the cooler part of the main sequence and their pre-main sequence predecessors define the dominant stellar population in the galaxy by number ...
A Antunes   +363 more
core   +5 more sources

A compact two-electrode field-emission X-ray source for soft X-ray spectroscopy applications [PDF]

open access: yesJournal of Synchrotron Radiation
Here, a compact two-electrode field-emission X-ray source employing a blade-type tungsten cathode was designed for soft X-ray spectroscopy. The device suppressed filament-derived optical and thermal background that is intrinsic to thermionic tubes, while
Junlin Li   +4 more
doaj   +2 more sources

Multi-Scale X-ray Imaging of the Pigment Discoloration Processes Triggered by Chlorine Compounds in the Upper Basilica of Saint Francis of Assisi

open access: yesMolecules, 2023
In this paper, the chromatic alteration of various types of paints, present on mural painting fragments derived from the vaults of The Upper Basilica of Saint Francis of Assisi in Italy (12th–13th century), is studied using synchrotron radiation.
Ermanno Avranovich Clerici   +6 more
doaj   +1 more source

A compact von Hámos spectrometer for parallel X-ray Raman scattering and X-ray emission spectroscopy at ID20 of the European Synchrotron Radiation Facility

open access: yesJournal of Synchrotron Radiation, 2023
A compact spectrometer for medium-resolution resonant and non-resonant X-ray emission spectroscopy in von Hámos geometry is described. The main motivation for the design and construction of the spectrometer is to allow for acquisition of non-resonant X ...
Ch. J. Sahle   +10 more
doaj   +1 more source

X - Ray Photoelectron Spectroscopy (XPS) Analysis ofPhosphating Film White Spot Structure [PDF]

open access: yesCailiao Baohu, 2021
In order to study the formation mechanism of white spot surface defect structure of phosphating film on the surface of phosphating film, the fine wire rods with the same parent material batch number and the same brand name SCM435 were used in the same ...
LIU Jie-li, FU Wen-zhe, ZHAO Guang-xing, ZHANG Lei, LI Zhao-yang, WANG Xiao-zhan
doaj   +1 more source

X ray spectroscopy on 𝚵− atoms (J-PARC E03, E07 and future) [PDF]

open access: yesEPJ Web of Conferences, 2022
X-ray spectroscopy of hadronic atoms is a powerful method to study strong interaction between hadrons and nuclei. At J-PARC, we have conducted two experiments, J-PARC E07 and E03, for hadronic atoms with a doubly strange hyperon, Ξ−, aiming at the world ...
Yamamoto Takeshi. O.   +17 more
doaj   +1 more source

Effect of germanium oxide on the structural aspects and bioactivity of bioactive silicate glass

open access: yesScientific Reports, 2023
Ternary silicate glass (69SiO2–27CaO–4P2O5) was synthesized with the sol–gel route, and different percentages of germanium oxide GeO2 (6.25, 12.5, and 25%) and polyacrylic acid (PAA) were added.
Taha M. Tiama   +3 more
doaj   +1 more source

X-ray absorption spectroscopy [PDF]

open access: yesPhotosynthesis Research, 2009
This review gives a brief description of the theory and application of X-ray absorption spectroscopy, both X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), especially, pertaining to photosynthesis. The advantages and limitations of the methods are discussed.
Yano, Junko, Yachandra, Vittal K.
openaire   +4 more sources

Nanofocused x-ray photon correlation spectroscopy

open access: yesPhysical Review Research, 2022
Here, we demonstrate an experimental proof of concept for nanofocused x-ray photon correlation spectroscopy, a technique sensitive to nanoscale fluctuations present in a broad range of systems. The experiment, performed at the NanoMAX beamline at MAX IV,
Sharon Berkowicz   +10 more
doaj   +1 more source

Laboratory-based X-ray spectrometer for actinide science

open access: yesJournal of Synchrotron Radiation, 2023
X-ray absorption and emission spectroscopies nowadays are advanced characterization methods for fundamental and applied actinide research. One of the advantages of these methods is to reveal slight changes in the structural and electronic properties of ...
Daniil Novichkov   +6 more
doaj   +1 more source

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