Ejection of an electron from the surface of matter, or atomic nucleus
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In physics, electron emission is the ejection of an electron from the surface of matter,[1] or, in beta decay (β− decay), where a beta particle (a fast energetic electron or positron) is emitted from an atomic nucleus transforming the original nuclide to an isobar.
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Field electronemission, also known as field emission (FE) and electron field emission, is emission of electrons induced by an electrostatic field. The...
In physics, electronemission is the ejection of an electron from the surface of matter, or, in beta decay (β− decay), where a beta particle (a fast energetic...
Thermionic emission (also known as thermal electronemission or the Edison effect) is the liberation of electrons from an electrode by virtue of its temperature...
converted into a neutron while releasing a positron and an electron neutrino (νe). Positron emission is mediated by the weak force. The positron is a type...
electron or positron), transforming into an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of...
material, induce the emission of secondary particles. The term often refers to the emission of electrons when charged particles like electrons or ions in a vacuum...
electron, usually from the K or L electron shells. This process thereby changes a nuclear proton to a neutron and simultaneously causes the emission of...
A field emission gun (FEG) is a type of electron gun in which a sharply pointed Müller-type[clarification needed] emitter: 87–128 is held at several kilovolts...
diagram, point A, represents the electron collection end. The bottom of the tether, point C, is the electronemission end. Similarly, V a n o d e {\displaystyle...
photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation (light). Electrons emitted in this manner are called...
as electron microscopes and particle accelerators. Electron guns may be classified by the type of electric field generation (DC or RF), by emission mechanism...
electronemission can be heat (thermionic emission), light (photoelectron emission), ions, or neutral particles, but normally excludes field emission...
conductive by injecting free electrons or ions through either field electronemission or thermionic emission. Thermionic emission occurs when the thermal energy...
cathode is a cathode electrode which is heated to make it emit electrons due to thermionic emission. This is in contrast to a cold cathode, which does not have...
An electron multiplier is a vacuum-tube structure that multiplies incident charges. In a process called secondary emission, a single electron can, when...
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making...
demagnified and finely focused electron beam. In the same year, Cecil E. Hall also completed the construction of the first emission microscope in North America...
called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during...
The electron affinity (Eea) of an atom or molecule is defined as the amount of energy released when an electron attaches to a neutral atom or molecule...
Stimulated emission is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular...
is accompanied by the emission of an electron from the same atom. When a core electron is removed, leaving a vacancy, an electron from a higher energy...
include a vacuum system in which the electrons travel, an electronemission source for generation of the electron stream, a series of electromagnetic lenses...
accompanied by the emission of an electron and an antineutrino, while proton to neutron transition (except in electron capture) causes the emission of a positron...
known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as...
it undergoes electron relaxation (deexcitation). This is accompanied by the emission of a photon (radiative relaxation/spontaneous emission) or by a transfer...
which results in an initial electronemission, and then often further characteristic X-rays and Auger electronsemissions, although the internal conversion...
only ones near to the surface can be detected. Therefore, secondary electronemission considers highly sensitive to the surface due to its generation occurs...
vacuum are excluded in defining the work function. Thermionic emission In thermionic electron guns, the work function and temperature of the hot cathode...
mechanics to solid-state problems, such as thermionic emission, work function of metals, field electronemission, rectification in metal-semiconductor contacts...
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