Results 21 to 30 of about 8,209,944 (376)

Surface Plasmons Excited by X-rays in the Surface Layers of Solids

open access: yesSolids, 2022
The phenomenon of total external reflection of X-rays at a sliding angle of incidence of a beam of incident X-rays is investigated. For metals, a quantitative law of direct dependence of the refractive index decrement on the interplane distance is ...
Valery M. Stozharov
doaj   +1 more source

Photophysical Properties of Anthracene Derivatives

open access: yesPhotochem, 2023
In this tutorial review, we intend to provide the reader with a comprehensive introduction to the photophysical properties of organic compounds with a specific focus on anthracene and its derivatives.
Agonist Kastrati   +3 more
doaj   +1 more source

Baryon breakdown in black hole

open access: yesFrontiers in Physics, 2022
According to relativity theory, a black hole is a distinct region in spacetime; according to astronomical observations, it is a celestial body transforming matter into high-energy jets.
Lauri Lehmonen, Arto Annila
doaj   +1 more source

Comparison of Megavoltage Electron Dosimetry Beams in Radiation Therapy Using Different Protocols [PDF]

open access: yesJournal of Kerman University of Medical Sciences
Background: International Atomic Energy Agency (IAEA) and American Association of physicist in Medicine (AAPM) have introduced new protocols for dosimetry of electron and photon megavoltage beams and increased them to more than five protocols at the ...
Zahra Jomehzadeh, Ali Jomehzadeh
doaj   +1 more source

CTFFIND4: Fast and accurate defocus estimation from electron micrographs

open access: yesbioRxiv, 2015
CTFFIND is a widely-used program for the estimation of objective lens defocus parameters from transmission electron micrographs. Defocus parameters are estimated by fitting a model of the microscope’s contrast transfer function (CTF) to an image’s ...
A. Rohou, N. Grigorieff
semanticscholar   +1 more source

Pseudopotential for the electron-electron interaction [PDF]

open access: yesPhysical Review B, 2015
We propose a pseudopotential for the electron-electron Coulomb interaction to improve the efficiency of many-body electronic structure calculations. The pseudopotential accurately replicates the scattering properties of the Coulomb interaction, and recovers the analytical solution for two electrons in a parabolic trap.
Lloyd-Williams, JH   +2 more
openaire   +3 more sources

On the Classical Coupling between Gravity and Electromagnetism

open access: yesAtoms, 2015
Coupling between electromagnetism and gravity, manifested as the distorted Coulomb field of a charge distribution in a gravitational field, has never been observed.
Maria Becker   +2 more
doaj   +1 more source

Collision of a Positron with the Capture of an Electron from Lithium and the Effect of a Magnetic Field on the Particles Balance

open access: yesChemosensors, 2021
The processes of scattering slow positrons with the possible formation of positronium play an important role in the diagnosis of both composite materials, including semiconductor materials, and for the analysis of images obtained by positron tomography ...
Elena V. Orlenko   +2 more
doaj   +1 more source

Bilepton Resonance in Electron-Electron Scattering [PDF]

open access: yes, 2000
Theoretical backgound for bileptonic gauge bosons is reviewed, both the SU(15) GUT model and the 3-3-1 model. Mass limits on bileptons are discussed coming from $e^+e^-$ scattering, polarized muon decay and muonium-antimuonium conversion. Discovery in $e^
Frampton, Paul H.
core   +3 more sources

Xfel: Mighty view into microworld [PDF]

open access: yesTehnika, 2014
European x-ray free electron laser, i.e. company and institute European XFEL GmbH (EuXFEL), represents the center point of contemporary particle physics, as well as precise, sophisticated and advanced engineering.
Ekmedžić Marko Ž., Rašuo Boško R.
doaj   +1 more source

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