Electron volt

Unit of energy

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synonym Electron volt (electron volt) generally refers to electron volt

Electron volt (electricity volt), with the symbol eV, is the unit of energy. Represents a Electronics (The charged quantity is 1.6 × 10 -19 C's negative charge ）Passing 1 volt Potential difference The kinetic energy obtained after acceleration.

Electron Volt and Energy Unit of SI System joule (J) The conversion relationship of is 1eV=1.602176634 × 10 −19^{[1 ]}

Chinese name: Electron volt
Foreign name: electron volt

Abbreviation: Electron volt
Symbol: eV
Unit conversion: 1eV=1.602176634×10 −19

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Mass energy conversion

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Einstein Mention that a certain amount of energy corresponds to a certain amount of mass, that is, the famous Mass energy equation E=mc2。 The use of this in microphysics, Mass and energy Often interchangeable, using eV/c two Or even directly use eV as a unit of mass. (When the latter is used, the speed of light c Set to 1 without unit.)

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For example, one electron and one positron (electronic Antiparticle ）, which have an energy of 511 keV and can collide and annihilate to produce 1.022 MeV. Proton, a standard baryon , has an energy of 0.938 GeV.

1 eV/c two = 1.783×10 -36 kg

1 keV/c two = 1.783 ×10 -33 kg

1 MeV/c two = 1.783×10 -30 kg

1 GeV/c two = 1.783 ×10 -27 kg

For comparison, the nuclear explosion charged particle Of Energy range About 0.3 to 3 MeV. The energy of molecules in the atmosphere is about 0.03 eV.

Convert the energy of particles from electron volts to Kelvin temperature Times 11604.505 (20) (see Boltzmann constant ）。

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