photoelectron
- noun
- /ˌfoʊtoʊˈɛktrɒn/
- Specialized
- A photoelectron is emitted when one quantum of electromagnetic energy is absorbed at an illuminated metal surface, the electron's energy gain being proportional to the frequency of the incident radiation.
Examples
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All Bayer array sensors are pretty linear devices—for every X photons they deliver Y photoelectrons up to the point where they saturate.
Blog text (14) -
The study showed that increasing photon intensity leads to a higher number of emitted photoelectrons from the metal surface.
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Many noise sources can overwhelm single-photoelectron signals.
Academic text (1998) -
The oscillations following the K-absorption edge for crystalline Ni result from backscattering of the photoelectron by neighboring atoms.
Academic text (1995) -
Achieving a spatial resolution substantially higher than that of the ESRF team will be difficult, given that the range of a primary photoelectron ejected when a hard x-ray is absorbed is greater than a micron in most materials.
Academic text (2012) -
The production of photoelectrons within the silver halide crystals of the photographic emulsion was also maximum for x-rays of around 25-30 keV.
Academic text (1995) -
Precise measurements of the energy-shifted photon, the photoelectrons, and the Auger electrons not only reveal the nature of this process but also provide details of the involved final and intermediate states.
Academic text (1995) -
The probability of producing a photoelectron (which can then excite fluorescence) varies as approximately the fourth power of the atomic number of the atoms within the microcrystals making up the fluorescent screen.
Academic text (1995) -
A photoelectron is emitted when a photon is absorbed, resulting in the release of energy from an atom.
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In a photoelectric experiment, the detection of a photoelectron helps to measure the energy of incoming photons.
Synonyms
A very small particle in atoms that has a negative electric charge and carries electricity
Surface Forms
Morphology
Etymology
Photoelectron joins photo- and electron: photo- means 'light', as in photograph, and electron is the small particle that carries electricity in atoms. So a photoelectron is an electron that light has knocked free from an atom.