Results 231 to 240 of about 519,650 (267)

ANALYTICAL FORMULATION OF THE ION–ION INTERACTION POTENTIAL INCLUDING SPIN DENSITY TERM IN ENERGY DENSITY FORMALISM

International Journal of Modern Physics E, 1992
The heavy-ion interaction potentials are calculated in sudden approximation, using the Fermi density distribution in the proximity theorem treatment of the Skyrme interaction energy density formalism. The contribution of the spin density term is included and the effects of varying the Skyrme force parameters, Fermi density parameters and the strength ...
RAJEEV K. PURI, RAJ K. GUPTA
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Ion Density and Biological Effectiveness of Radiations

Acta Agriculturae Scandinavica, 1954
(1954). Ion Density and Biological Effectiveness of Radiations. Acta Agriculturae Scandinavica: Vol. 4, No. 1, pp. 396-418.
Lars Ehrenberg, Nils Nybom
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Ultrahigh Current Density Ion Implantation

JOM, 1987
A study of several engineering alloys implanted at ultrahigh current densities has revealed that the process induces no change in the bulk microsctructure of the materials. Even though temperatures induced during processing exceed the transformation (tempering and annealing) temperatures, there is insufficient time for nucleation and growth reactions ...
W. S. Sampath, R. Wei, P. J. Wilbur
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Density of Salt Solutions:  Effect of Ions on the Apparent Density of Water

The Journal of Physical Chemistry B, 2001
The apparent density of water in aqueous solutions is analyzed by assuming that the volume occupied by the ions, in the absence of contact ion pairs, can be approximated reliably by spheres with appropriate ionic radii. X-ray data for ionic solutions are used to identify the ionic radii with crystal radii.
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Coherent ion acceleration at a density gradient

Journal of Plasma Physics, 1975
The paper describes a model, in which ions are accelerated against the direction of the electric field at a density gradient. A one-dimensional, inhomogeneous, steady-state is constructed, in which cold electrons stream relative to cold ions. The wavenumber and amplitude of the fluctuating potential are calculated, then used to compute the trajectories
Shiew L. Hsieh, Howard W. Bloomberg, S. Peter Gary   +2 more
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Ion density in ionizing beams. I

Plasma Physics, 1978
The general equations are derived from which one may determine the steady, nonquasineutral ion density in a steady ionizing beam as a function of three basic but arbitrary data: the boundary conditions, the density of the ionizing beam and its ion production per unit of volume and time. The conditions of validity are discussed briefly. Part of the work
Dirk K Callebaut, Gilbert K Knuyt
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Ion density variation effects in plasma source ion implantation

Surface and Coatings Technology, 2002
Plasma-source ion implantation (PSII) is a well-developed technique for introducing ions into a material specimen for enhancement of the surface properties. The technique is moving from the research to the industrial level, where specimens of large surface area need to be treated simultaneously.
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Spin Density in Pyrene Negative Ion

The Journal of Chemical Physics, 1961
Improved resolution has permitted assignment of all proton hyperfine coupling constants in pyrene negative ion. The results are accounted for by a simple calculation of configurational interaction.
G. J. Hoijtink, J. Townsend, S. I. Weissman   +2 more
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Electron and ion densities in corona plasma

Czechoslovak Journal of Physics, 2006
In atmospheric pressure corona systems, the densities of electrons and ions determine the level of treatments. Here, the electron and ion densities in a corona plasma are evaluated for a DC positive-polarity wire discharge in dry air at atmospheric pressure, in the coaxial wire-cylinder geometry.
SPARAVIGNA, Amelia Carolina, WOLF R. A.
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The Role of Ions in Reactive Ion Etching with Low Density Plasmas

1997
Several studies of plasma-assisted etching were reported in the mid-1970s which demonstrated the importance of energetic ion bombardment [1–3]. In this work the terms chemical sputtering [2] and reactive ion etching RIE [3] were introduced. Subsequently, directed beam studies [4] showed more clearly the synergism between energetic ions and chemically ...
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