thermionic emission


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emission

 [e-mish´un]
1. a discharge.
2. an involuntary discharge of semen.
nocturnal emission reflex emission of semen during sleep.
thermionic emission the application of heat, such as to a filament, resulting in the emission of electrons and ions.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ther·mi·on·ic e·mis·sion

(thĕr'mī-on'ik ē-mish'ŭn)
Sending out of free electrons by a filament that is heated by an electric current passing through it, as in an x-ray tube.
Synonym(s): Edison effect.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

ther·mi·on·ic e·mis·sion

(thĕr'mī-on'ik ē-mish'ŭn)
Release of electrons that occurs when tungsten filament of a cathode is heated to incandescence.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Obtained results indicated that thermionic emission cannot be the dominant current conduction mechanism in the MPS structure.
The electrode-limited conduction mechanisms include (1) Schottky or thermionic emission, (2) Fowler-Nordheim tunneling, (3) direct tunneling, and (4) thermionic-field emission.
The absence of a single linear region on semi-log IV curves is observed for these devices, which is inconsistent with thermionic emission. Linear regions with two different slopes observed on a log-log scale could explain this behavior, where at lower voltages the charge transport mechanism is consistent with Ohm's law but at higher voltages the charge transport is consistent with Child's law of space-charge-limited emission.
However, the content of the Pd and Si[O.sub.2] in mixture is uniform, and the thermionic emission over the metal-semiconductor barrier and the insulator-semiconductor barrier is responsible for carrier transport.
According to the thermionic emission model, for a metal/semiconductor (M/S) or metal/polymer (M/P) contact [39-42], the I-V characteristic under the forward and reverse bias voltages through an SBD can be represented as