In particle physics, the electron mass (symbol: me) is the mass of a stationary electron, also known as the invariant mass of the electron. It is one of the fundamental constants of physics. It has a value of about 9.109×10−31 kilograms or about 5.486×10−4 daltons, which has an energy-equivalent of about 8.187×10−14 joules or about 0.511 MeV.[3]
^"2018 CODATA Value: electron mass". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20.
^"2018 CODATA Value: electron mass in u". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2020-06-21.
^ ab"2018 CODATA Value: electron mass energy equivalent in MeV". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2022-07-11.
particle physics, the electronmass (symbol: me) is the mass of a stationary electron, also known as the invariant mass of the electron. It is one of the...
or substructure. The electron'smass is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular...
(symbol eV, also written electron-volt and electron volt) is the measure of an amount of kinetic energy gained by a single electron accelerating from rest...
a•- and x-type product ions. Electron-detachment dissociation (EDD) is a method for fragmenting anionic species in mass spectrometry. It serves as a negative...
antiparticle of the electron. (See also Dirac sea.) In crystals, electronic band structure calculations lead to an effective mass for the electrons that is typically...
energetic electrons interact with solid or gas phase atoms or molecules to produce ions. EI was one of the first ionization techniques developed for mass spectrometry...
light: The mass of the neutron must be of the same order of magnitude as the electronmass and, in any case, not larger than 0.01 proton mass. The continuous...
(elementary charge). Its mass is slightly less than the mass of a neutron and 1,836 times the mass of an electron (the proton-to-electronmass ratio). Protons...
the electron degeneracy pressure, m is substituted by the electronmass me and the Fermi momentum is obtained from the Fermi energy, so the electron degeneracy...
1/2 (the same as the electron), and the same mass as an electron. It is the antiparticle (antimatter counterpart) of the electron. When a positron collides...
Electron capture (K-electron capture, also K-capture, or L-electron capture, L-capture) is a process in which the proton-rich nucleus of an electrically...
reduced Planck constant, m e {\displaystyle m_{\text{e}}} is the mass of an electron, e {\displaystyle e} is the elementary charge, c {\displaystyle c}...
equivalently, the magnitude of the negative electric charge carried by a single electron, which has charge −1 e. In the SI system of units, the value of the elementary...
homogeneous charge distribution to the electron's relativistic mass-energy. According to modern understanding, the electron is a point particle with a point...
object and its dimension is length divided by time; while the proton-to-electronmass ratio, is dimensionless. The term "fundamental physical constant" is...
example, an electron neutrino produced in a beta decay reaction may interact in a distant detector as a muon or tau neutrino. The three mass values are...
the elementary charge, ħ is the reduced Planck constant, me is the electronmass, c is the speed of light. The idea of elementary magnets is due to Walther...
problem. To analyze the motion of the electron, a one-body problem, the reduced mass replaces the electronmass m e → m e m p m e + m p {\displaystyle...
assumption that the electron can be treated as free is invalid resulting in the effectively infinite electronmass equal to the nuclear mass (see e.g. the comment...
negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe. In...
been omitted. A precise value of the electronmass is 0.51099895000(15) MeV/c2. A precise value of the muon mass is 105.6583755(23) MeV/c2. Bosons are...
identification of organic compounds from electron ionization mass spectrometry. Organic chemists obtain mass spectra of chemical compounds as part of...
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