Results 11 to 20 of about 725,247 (264)

Electron Density Distribution in Organometallic Materials

open access: yesCHIMIA, 2009
The electron density distribution is a fundamental property that provides information on the way in which atoms are held together to form molecules, polymers or supramolecular aggregates.
Piero Macchi
doaj   +1 more source

Mid-point electron density profiles from oblique ionograms

open access: yesAnnals of Geophysics, 1996
A computationally efficient technique for the inversion of oblique ionograms into mid-point electron density profiles is described. The profile is given as the sum of quasi-parabolic functions suitable for ray tracing.
W. S. Kuklinski   +2 more
doaj   +1 more source

Differential Resonance Probe (Electron Density Probe)

open access: yesAntarctic Record, 1975
This paper deals with "differential resonance probe method", which is one of the RF plasma probe techniques. This probe method is compared with other electron density probe method.
Yoshio TAKEYA, Shigeyuki MINAMI
doaj   +1 more source

Learning (from) the Electron Density: Transferability, Conformational and Chemical Diversity

open access: yesCHIMIA, 2020
Machine-learning in quantum chemistry is currently booming, with reported applications spanning all molecular properties from simple atomization energies to complex mathematical objects such as the many-body wavefunction.
Alberto Fabrizio   +3 more
doaj   +1 more source

Electron densities in planetary nebulae [PDF]

open access: yesThe Astrophysical Journal, 1989
A large sample of forbidden lines -[O II], [S II], [Ar IV], and [N I]- have been analyzed to obtain electron densities for 134 planetary nebulae.
Letizia Stanghellini, James B. Kaler
openaire   +1 more source

Earth's ionosphere D-region vertical electron density profile data during March 1-31, 2017 according to high-latitudinal Tumanny observatory partial reflection radar measurements and Polar Geophysical Institute's model

open access: yesData in Brief, 2020
The Earth's high-latitudinal D-Region ionosphere measurements are rarely performed continuously and with high temporal resolution. This data article provides the observed and modelled data on D-Region electron density variations during March 1-31, 2017 ...
Aleksandr Gomonov   +2 more
doaj   +1 more source

Electron Wavefunctions and Densities for Atoms [PDF]

open access: yesAnnales Henri Poincaré, 2001
With a special `Ansatz' we analyse the regularity properties of atomic electron wavefunctions and electron densities. In particular we prove an a priori estimate, $\sup_{y\in B(x,R)}|\nablaψ(y)| \leq C(R) \sup_{y\in B(x,2R)}|ψ(y)|$ and obtain for the spherically averaged electron density, $\widetildeρ(r)$, that $\widetildeρ''(0)$ exists and is non ...
Hoffmann-Ostenhof, Maria   +2 more
openaire   +3 more sources

AIM-E AURORAL IONOSPHERE MODEL ADJUSTMENT FOR THE REGULAR E LAYER

open access: yesSolar-Terrestrial Physics, 2021
The E-Region Auroral Ionosphere Model (AIM-E) was developed to determine the chemical composition and electron density in the auroral zone at E-layer heights (90–150 km).
V.D. Nikolaeva   +3 more
doaj   +1 more source

Use of nuclear physics methods for investigation of short-range ordering and defects in iron based simulatuing alloys [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2020
The changes of short range ordering and electron density were investigated by means of the nuclear gamma-resonance and the positron annihilation spectroscopies in model alloys containing tungsten, chromium, molybdenum, and vanadium used as dopants.
Evstyukhina I.A.   +7 more
doaj   +1 more source

An effective potential of electron-electron interaction in semi-infinite jellium

open access: yesCondensed Matter Physics, 2006
An effective potential of electron-electron interaction and a two-particle "density-density" correlator are calculated for semi-infinite jellium. Their asymptotics at large distances between electrons are studied in a plane parallel to the surface.
P.P.Kostrobij, B.M.Markovych
doaj   +1 more source

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