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electron
electron
electron An elementary particle carrying a negative charge. Electrons are found in
energy levels orbiting the nucleus of an atom. In a neutral atom, the number of electrons is equal to the number of protons. When detached from an atom they are called
free electrons. Electrons have a charge of 1.602 × 10
-19 coulomb and a mass of 9.109 × 10
-31 kg. The antiparticle of the electron is the
positron.
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Electrons may shed light for X-ray lasers.
Magazine article from: Science News; 9/16/1989; ; 700+ words
; ...particles, including electrons, have a wave-like nature. Thus, when an electron travels through a wall...steps necessary for electrons to produce a free electron laser, they explain. In the first step, electrons striking the grating...
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Electrons flow as water through a pipe
Magazine article from: InTech; 2/1/2009; ; 676 words
; ...force when describing voltage. Electrons move from atom to atom to take up a spot vacated by the previous electron. Electrons flow in an orderly manner through...water flow in a pipe with that of electron flow in a conductor. When you...
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Electrons probe to subangstrom levels.(Electron Microscopy)
Magazine article from: Laser Focus World; 11/1/2004; ; 700+ words
; ...subangstrom beam. Scanned electron probe Ordinary TEMs aim a planar wavefront of electrons at a thin sample, which...scatters a number of the electrons. An objective lens...STEM, in contrast, an electron lens before the sample focuses a beam of electrons to form a small probe...
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Hydrated Electrons Can Take More Than One Guise.
News Wire article from: Ascribe Higher Education News Service; 12/21/2004; 700+ words
; ...interaction between electrons and water. "We...which a hydrated electron is localized within...of the hydrated electron to mimic the effects...presence of hydrated electrons in water clusters...internally solvated electrons and are therefore...a bulk hydrated electron." From their ...
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Electron Irradiation-Induced Phase Transition of an Amorphous Phase and Face-Centered Cubic Solid Solutions in Zr^sub 66.7^Pd^sub 33.3^ Metallic Glass
Magazine article from: Metallurgical and Materials Transactions; 2/1/2007; ; 700+ words
; ...7Pd33.3 metallic glass under electron irradiation. The melt-spun amorphous...phase was not stable under 2.0 MV electron irradiation and two kinds of fcc...solution were precipitated through electron irradiation-induced crystallization...
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Ballistic electrons may create new path for computer electronics.
PR Newswire; 12/7/1989; 700+ words
; ...and focus ballistic electrons will allow new types...made that use directed electron beams. A Long Road...normal conditions, electrons traveling through a...that such ballistic electron transport, without...device. To encourage electrons to travel through the...
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Electron-beam guns hit the mark with new applications.
Magazine article from: R & D; 8/1/1990; ; 700+ words
; ...today's high-power electron-beam equipment. The...when highly accelerated electrons hit a target and transfer...and/or evaporation. Electron beams also can be used...see figure). An electron-beam line evaporator...device prevents secondary electrons from impinging on the...
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Electrons with drag; a newly discovered class of intermetallic compounds with unusual thermal and electromagnetic properties is revealing some basic new physics of condensed matter.
Magazine article from: Science News; 5/10/1986; ; 700+ words
; ELECTRONS WITH DRAG Condensed-matter physicists have studied...their unusual properties to the influence of "heavy' electrons, which behave as if they were much heavier than electrons usually are. The materials go under the name "heavy...
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Electrons in boxes: probing artificial atoms to stretch quantum physics.
Magazine article from: Science News; 4/11/1998; ; 700+ words
; ...probe the shenanigans of electrons inside microscopic semiconductor...electric field traps an electron in much the same way...mechanics and the effects of electron-electron interactions can be...dots to explore how electrons behave in boxes many...
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Electrons probe ultrafast dynamics. (Spectrometers).
Magazine article from: Laser Focus World; 3/1/2003; ; 700+ words
; ...orbital time for an electron in the ground state...reconfigures its own electrons. In the past four...these recollision electrons (see Fig. 1...simultaneously freeing the electron that subsequently...measure the time of electron-ion recollision...scattering of the electrons upon ...
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Electrons
Book article from: Science of Everyday Things
ELECTRONS CONCEPT No one can see an electron. Even an electron microscope...the atom that has lost an electron or electrons becomes a positively charged...instance, an atom that gains an electron or electrons becomes a negatively charged...
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Electron
Encyclopedia entry from: UXL Encyclopedia of Science
...That flow of electrons is an electric current. Electron energy levels The...to that of the electron. But it is known...appropriate for electrons. The uncertainty...energy levels. Electron properties Electrons have three fundamental...
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Electron Microscopy
Book article from: Biology
...freely and are described as electron-lucent regions. Electrons that pass through the lightly stained, electron-lucent regions lose relatively...The more heavily stained, electron-dense regions cause some electrons to lose energy and others...
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Electron Cloud
Encyclopedia entry from: The Gale Encyclopedia of Science
Electron Cloud The term electron cloud describes the area around an atomic nucleus where electrons will probably be. It is also described as...x201C; fuzzy ” orbit of an atomic electron. An electron bound to the nucleus of an...
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Scanning Electron Microscopy
Book article from: World of Forensic Science
...row by row. As the electron beam sweeps the surface, it excites electrons present in the atomic...known as secondary electrons and most of them...charges inferior to ten electron Volts (<10 eV). Elastic electrons are those that collide...
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