Results 31 to 40 of about 364,432 (293)

Unsupervised Machine Learning for Unbiased Chemical Classification in X-ray Absorption Spectroscopy and X-ray Emission Spectroscopy [PDF]

Physical Chemistry Chemical Physics, 2021
We report a comprehensive computational study of unsupervised machine learning for extraction of chemically relevant information in X-ray absorption near edge structure (XANES) and in valence-to-core X-ray emission spectra (VtC-XES) for classification of a broad ensemble of sulforganic molecules. By progressively decreasing the constraining assumptions
Samantha Tetef, Niranjan Govind, Gerald T. Seidler   +2 more
openaire   +2 more sources

X-ray and HeI 1.0830 mu emission from protostellar jets [PDF]

, 2006
Context. The high energies of protostellar jets, implied by recent observations of X-rays from such flows, came very much as a surprise. Inferred shock velocities are considerably higher than what was previously known, hence putting even larger energy ...
Bonito, Bray, Cohen, Favata, Favata, Ferland, Fridlund, Giannini, Giannini, Giannini, Grosso, Güdel, Hartigan, Hummer, Itoh, Liseau, McCoey, Meikle, Nisini, Ostriker, Pozzo, Pravdo, Pravdo, Preibisch, Quinet, R. Liseau, Raga, Reipurth, Rieke, Takami, Tsujimoto, White, Zirin   +32 more
core   +2 more sources

A green protocol for the one-pot synthesis of 3,4-disubstituted isoxazole-5(4H)-ones using modified β-cyclodextrin as a catalyst

Scientific Reports, 2022
This manuscript reports an impressive and facile strategy for synthesizing isoxazole derivatives using immobilized Cu (I) in metformin-functionalized β-cyclodextrin as a catalyst.
Mahdieh Tajbakhsh, Mohammad Reza Naimi-Jamal, Saeed Balalaie, Mohadeseh Rezaeian   +3 more
doaj   +1 more source

Application of reverse micelle sol-gel synthesis for bulk doping and heteroatoms Surface Enrichment in Mo-Doped TiO 2 nanoparticles [PDF]

, 2019
TiO 2 nanoparticles containing 0.0, 1.0, 5.0, and 10.0 wt.% Mo were prepared by a reverse micelle template assisted sol-gel method allowing the dispersion of Mo atoms in the TiO 2 matrix.
Armandi, Marco, Bonelli, Barbara, Ditaranto, Nicoletta, Esposito, Serena, Freyria, Francesca S., Gadhi, Tanveer A., Hernandez, Simelys, Nasi, Roberto, Rivolo, Paola   +8 more
core   +2 more sources

Probing ion-specific effects on aqueous acetate solutions: Ion pairing versus water structure modifications

Structural Dynamics, 2014
The effect of monovalent cations (Li+, K+, NH4+, Na+) on the water structure in aqueous chloride and acetate solutions was characterized by oxygen K-edge X-ray absorption spectroscopy (XAS), X-
Tristan Petit, Kathrin M. Lange, Gerrit Conrad, Kenji Yamamoto, Christoph Schwanke, Kai F. Hodeck, Marcus Dantz, Tim Brandenburg, Edlira Suljoti, Emad F. Aziz   +9 more
doaj   +1 more source

A von Hámos spectrometer for diamond anvil cell experiments at the High Energy Density Instrument of the European X-ray Free-Electron Laser

Journal of Synchrotron Radiation, 2023
A von Hámos spectrometer has been implemented in the vacuum interaction chamber 1 of the High Energy Density instrument at the European X-ray Free-Electron Laser facility.
Johannes M. Kaa, Zuzana Konôpková, Thomas R. Preston, Valerio Cerantola, Christoph J. Sahle, Mirko Förster, Christian Albers, Lélia Libon, Robin Sakrowski, Lennart Wollenweber, Khachiwan Buakor, Anand Dwivedi, Mikhail Mishchenko, Motoaki Nakatsutsumi, Christian Plückthun, Jan-Patrick Schwinkendorf, Georg Spiekermann, Nicola Thiering, Sylvain Petitgirard, Metin Tolan, Max Wilke, Ulf Zastrau, Karen Appel, Christian Sternemann   +23 more
doaj   +1 more source

Hard x-ray photon-in-photon-out spectroscopy with lifetime resolution – of XAS, XES, RIXSS and HERFD

, 2007
Spectroscopic techniques that aim to resolve the electronic configuration and local coordination of a central atom by detecting inner-shell radiative decays following photoexcitation using hard X-rays are presented.
Eeckhout, S.G., Glatzel, P., Grunewaldt, J.-D., Pirngruber, G., Safonova, O.V., Sikora, M., Smolentsev, G., Tromp, M., van Bokhoven, J.A.   +8 more
core   +1 more source

1FGL J1417.7-4407: A likely gamma-ray bright binary with a massive neutron star and a giant secondary [PDF]

, 2015
We present multiwavelength observations of the persistent Fermi-LAT unidentified gamma-ray source 1FGL J1417.7-4407, showing it is likely to be associated with a newly discovered X-ray binary containing a massive neutron star (nearly 2 M_sun) and a ~ 0 ...
Cheung, C. C., Chomiuk, Laura, Corbet, Robin, Donato, Davide, Edwards, Philip G., Finzell, Thomas, Haislip, Joshua, Koeppe, Dana, Peacock, Mark, Petrov, Leonid, Reichart, Daniel, Salinas, Ricardo, Sand, David J., Stevens, Jamie, Strader, Jay   +14 more
core   +3 more sources

X-ray diagnostics of massive star winds

, 2016
Nearly all types of massive stars with radiatively driven stellar winds are X-ray sources that can be observed by the presently operating powerful X-ray telescopes.
Oskinova, Lidia
core   +1 more source

Capturing fingerprints of conical intersection: Complementary information of non-adiabatic dynamics from linear x-ray probes

Structural Dynamics, 2021
Many recent experimental ultrafast spectroscopy studies have hinted at non-adiabatic dynamics indicating the existence of conical intersections, but their direct observation remains a challenge.
Deependra Jadoun, Mahesh Gudem, Markus Kowalewski   +2 more
doaj   +1 more source