free electron


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

free electron

n
(General Physics) any electron that is not attached to an ion, atom, or molecule and is free to move under the influence of an applied electric or magnetic field
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Noun1.free electron - electron that is not attached to an atom or ion or molecule but is free to move under the influence of an electric field
electron, negatron - an elementary particle with negative charge
References in periodicals archive ?
The third day represented one of the module's high notes with the Level-Up Energy Innovation event, which presented the Free Electron participants to the Silicon Valley ecosystem.
It means that when the intensity of the X-ray excitation increases, according to (2), the free electron lifetime in conduction band decreases.
As part of the "Free Electron" section, the Carthage Acropolium will host on December 1-2 artists Gymkhana and oumaima Manai, NMO, Fabrizio Rat, Nour Harakati, Aytma, Hindi Zahra and the Wanton Bishops.
He covers the optical factor, polarization, gain, antenna issues, the ground wave, the reflection process, the ionosphere, instrumentation and interpretation, neutral propagation, WWV and channel probes, free electron propagation, neutral propagation, SVIS modes and methods, and a wide variety of other related subjects.
where [[lambda].sub.enz] =h/([m.sub.e] [v.sub.enz]) is quantized wave length of the longitudinal drift of a free electron with the rest mass [m.sub.e] =9.109 x [10.sup.-31] kg [3]; [v.sub.enz] =nh/(2[m.sub.e][l.sub.0]) is the quantized longitudinal velocity of a free electron drift; [[lambda].sub.enr] =h/([m.sub.e][v.sub.enr]) is the quantized wave length of the longitudinal drift of free electron; [v.sub.enr] =nh/(2[m.sub.e][r.sub.0]) is the quantized radial velocity drift of free electron in the conductor material; h=6.626 x [10.sup.-34] J x s is the Planck constant [3].
Britain is to invest [pounds sterling]30m in the new European X-ray Free Electron Laser (XFEL) facility that will be capable of generating more power than the entire national grid to create a flash momentarily brighter than a trillion lightbulbs.
* A free electron in a metal travels in average a distance equal to its mean free path, with a constant velocity [v.sub.F], until to collide with the ionic vibrations (phonons).
where an incident neutrino with energy [E.sub.v] transfers to a free electron, which is initially at rest in the laboratory frame, the energy-momentum q.
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.
Their topics include the structure and dynamics of solvated electrons, a history of pulse-radiolysis time-resolved microwave conductivity studies, chemical processes in heavy ion tracks, ultrafast pulse radiolysis methods, pulse radiolysis in supercritical krypton and xenon fluids, radiation-induced processes at solid-liquid interfaces, femtosecond events in bimolecular free electron transfer, the chemistry of sulfur-centered radicals, indirect effects of radiation-induced DNA damage, and radiation chemistry applied to antioxidant research.
The center will consist of different scale electron, positron and proton accelerators to study experimental particle and nuclear physics and to produce synchrotron radiation and free electron lasers to use in basic and applied sciences.
On other hand, if the doping of impurities are very high free electron (hole) phonon model is used to explain the conductivity.