Electron Volt

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Related to Electron Volt: Planck's constant

Electron Volt


a subsidiary unit of energy, equal to the energy acquired by a particle having an elementary charge, oi the charge of an electron, when the particle is moved in an accelerating electric field between two points with a potential difference of 1 volt. The international symbol is eV.

One electron volt equals 1.60219 x 10–19 joule. Multiple units are also used. For example, the kiloelectron volt (keV) equals 103 eV; the megaelectron volt (MeV) equals 106 eV.

The masses of elementary particles are often expressed in electron volts. Such usage is based on the Einstein mass-energy relation E = mc2. The equation relates the mass m of a particle and the particle’s total energy E; c is the speed of light. The energy corresponding to an atomic mass unit is (931.5016 ± 0.0026) MeV.

References in periodicals archive ?
The primary instrument is the Large Area Telescope, which detects gamma rays with energies of 20 million electron volts to greater than 300 billion electron volts.
The particle's mass is around 125 billion electron volts, about 133 times the mass of a proton.
Optical light, in comparison, is about 2 electron volts.
So the Large Hadron Collider was designed to collide protons with energies exceeding several trillion electron volts.
This subatomic detritus--seen by both ATLAS and the Compact Muon Solenoid detector at the LHC--is suggestive of a Higgs boson with a mass of about 125 billion electron volts (the mass of a proton is about 1 billion electron volts).
Reports said that two proton beams circulating in alternate directions collided and reached the maximum planned energy levels of seven trillion electron volts within a few minutes.
To fit with the standard model of particle physics, the Higgs must now be lighter than 145 billion electron volts, or GeV, team members from LHC's ATLAS and CMS experiments reported August 22 in Mumbai, India, at the International Symposium on Lepton Photon Interactions at High Energies.
The most plausible explanation for the high energy is that protons bouncing back and forth between the two stellar winds attain energies of at least 10 trillion electron volts.
suggesting that the elusive Higgs does not have a mass between 158 billion and 175 billion electron volts.
The atom smasher will reach world record power later this month at 7 trillion electron volts (TeV).