Results 251 to 260 of about 9,228,850 (295)

Ionization potentials of transition-metal clusters

Physical Review B, 1993
An alternative approach to the ionization potential of transition-metal clusters has been presented. The mean effective coordination number of surface atoms is taken as a parameter to reflect the d-band width of the cluster and a tight-binding theory is used to establish this relation.
, Zhao, , Han, , Wang
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Mechanical potentials due to Raman transitions

Physical Review A, 1996
We investigate the mechanical potential of an atom due to a Raman transition. This is a generalization of the usual two-level dipole potential. With sufficiently large one- and two-photon detunings the forms of the potential and excitation probability are the same as for the two-level case, but with a scaled detuning. This allows greater effective blue
, Hope, , Savage
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Transition moments for linear potentials

Journal of Physics A: Mathematical and General, 1982
A new method based on hypervirial relationships is used to calculate transition moments for linear potentials of bounded systems, generalising previous results. The deduced equations are applied to the model of an electron in a finite unidimensional crystal under the influence of an external uniform electric field.
F M Fernandez, G A Arteca, S A Maluendes, E A Castro   +3 more
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Energy Transitions and Potentials for Democratic Change

2018
This chapter sets forth the critical (in)sight made possible by the book’s inquiry into current conduct of energy transition. Placing the sights derived from our inquiry side by side, it shows that ‘renewable energy resource’, ‘market’, ‘economic instrument’, ‘technological demonstration’, ‘scale’, and ‘horizon’ should all be regarded as constructed ...
Labussiere, Olivier, Nadaï, Alain
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The Potential For Transit Standards

SAE Technical Paper Series, 1976
<div class="htmlview paragraph">There is little doubt that there is a desire for transit standards to assist in decision making across the entire range of planning, designing, constructing and operating the transit system. Even discussing this broad range is difficult, since both the breadth and depth of potential application areas for standards ...
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On the Peierls transition in a periodic potential

Solid State Communications, 1984
Abstract The properties of a one-dimensional conductor in the presence of an external periodic potential V Q have been investigated. The low temperature gap is enhanced, the temperature dependence of the gap Δ(T) is smeared at T PF , the Peierls transition temperature in the absence of V Q , and hence there is no longer a real phase transition.
Lars Kai Hansen, Kim Carneiro
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Vibrational Transitions and the Intermolecular Potential

The Journal of Chemical Physics, 1960
Temperature-dependence studies of vibrational collision lifetimes by the authors have indicated that the application of the Schwartz, Slawsky, and Herzfeld theory to substituted methane molecules with heavy surface atoms results in repulsive ranges which are shorter than those expected from a Lennard-Jones 6:12-type interaction.
Robert C. Amme, Sam Legvold
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Interatomic potentials in transition metals

Radiation Effects, 1980
Abstract The different roles played by the valence s and d electrons in determining the bulk properties of pure transition metals is described. In the light of this the expected behaviour of the inert gas-metal and metal-metal interatomic potentials is discussed.
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Interatomic Potentials in Transition Metals

2023
Abstract In this chapter, multi-ion quantum-based interatomic potentials are derived for transition metals with partially filled d bands, using the full density-functional power of generalized pseudopotential theory (GPT). Central to this treatment is the development of a rigorous multi-ion d-state potential series through the level of ...
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Epithelial–mesenchymal transition and the invasive potential of tumors

Trends in Molecular Medicine, 2008
The development of metastasis requires the movement and invasion of cancer cells from the primary tumor into the surrounding tissue. To acquire such invasive abilities, epithelial cancer cells must undergo several phenotypic changes. Some of these, including alterations in cell adhesion and migration, are reminiscent of those observed during the ...
Nancy, Gavert, Avri, Ben-Ze'ev
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