free electron


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Related to free electron: Free electron gas, Free electron laser

free electron

An electron that is not bound to an atom, molecule, or ion but is free to move under the influence of an electric or magnetic field.

free electron

[¦frē i′lek‚trän]
(physics)
An electron that is not constrained to remain in a particular atom, and is therefore able to move in matter or in a vacuum when acted on by external electric or magnetic fields.
References in periodicals archive ?
There are no free electrons in these materials because all of them are connected with their atoms; and the impact of light does not induce conduction current.
SPR is supported by 380 free electrons based on composition assignment.
ONR has sponsored free electron laser research at Brookhaven National Laboratory, Argonne National Laboratory, Los Alamos National Laboratory, the Naval Research Laboratory, the Department of Energy's Thomas Jefferson National Accelerator Facility (Jefferson Lab), the University of Maryland, Vanderbilt University and Stanford University.
The method was given the name Free Electron Laser (FEL).
By taking into account that the free electron has a fermionic character, we will write a non-linear Dirac-like equation describing the "motion" of this particle.
5 within which the positive energy of the free electron and the negative energy of the PV overlap, allowing electron-positron pairs to be excited; surrounding this combination is a spherical annulus of radius [r.
Ukraine) presents a theory of free electron lasers as hierarchic oscillation-wave electrodynamic systems, emphasizing the specific philosophy and general ideology of the phenomenon of oscillation and wave hierarchy from which his calculations and physical and applied results follow directly.
Sprangle's directed-energy research includes high-energy laser propagation, free electron lasers, fiber-laser directed energy systems, laser power beaming, ultra-short, high-intensity laser physics, advanced methods of detection of radioactive material as well as advanced radiation and acceleration physics.
These experiments, which use x-ray free electron lasers, push the envelope of extreme nonlinear optics at sub-angstrom wavelengths.
The two guns include the free electron laser, essentially a super-powered death ray, and the railgun, which shoots bullets powered not by explosions, but by energy, Fox News reports.
Organization is in 18 chapters beginning with basic properties of crystals and proceeding through phonons and lattice vibrations, free and nearly free electron models, band-structure calculations, static and transport properties of solids, electron-electron interaction, dynamics of Bloch electrons, semiconductors, electronics, spintronics, diamagnetism and paramagnetism, magnetic ordering, superconductivity, heavy fermions, metallic nanoculsters, complex structures, and novel materials.
suggests the connection in (2) between the free electron and the PV.