Stacey, Nuclear Reactor Physics, John Wiley & Sons, 2001, ISBN: 0- 471-39127-1. Baratta, Introduction to Nuclear Engineering, 3d ed., Prentice-Hall, 2001, ISBN: 8-1. Lamarsh, Introduction to Nuclear Reactor Theory, 2nd ed., Addison-Wesley, Reading, MA (1983). Together with the tauon it forms the third generation of leptons, hence the name tau neutrino. It has no net electric charge and a spin of ½. The tau neutrino is a subatomic lepton elementary particle which has the symbol ν τ. Together with the muon it forms the second generation of leptons, hence the name muon neutrino. The muon neutrino is a subatomic lepton elementary particle which has the symbol ν μ. Together with the electron it forms the first generation of leptons, hence the name electron neutrino. The electron neutrino is a subatomic lepton elementary particle which has the symbol ν e. Neutrinos are weakly interacting subatomic particles with ½ unit of spin. A neutrino is an elementary subatomic particle with infinitesimal mass (less than 0.3 eV.?) and with no electric charge. Neutral leptons (better known as neutrinos) are electrically neutral particles that rarely interact with anything, and are consequently rarely observed.Tau leptons have a lifetime of 2.9×10 −13 s. Taus are approximately 3,700 times more massive than electrons. The tau (τ), also called the tau lepton, tau particle, or tauon, is an elementary particle similar to the electron, with an electric charge of −1 e and a spin of ½. The muon is an unstable subatomic particle with a mean lifetime of 2.2 µs. Muons are heavier, having more than 200 times as much mass as electrons. The muon is an elementary particle similar to the electron, with an electric charge of −1 e and a spin of ½. The electron is only one member of a class of elementary particles, which forms an atom. Electrons are located in an electron cloud, which is the area surrounding the nucleus of the atom. The electron is a negatively charged particle with a mass that is approximately 1/1836 that of the proton. Charged leptons can combine with other particles to form various composite particles such as atoms and positronium. This fact has key implications for the building up of the periodic table of elements.Īny of the six elementary particles that (with their antiparticles) are not quarks are leptons.

leptons are spin- 1⁄2 particles and thus that they are subject to the Pauli exclusion principle. Leptons are said to be elementary particles that is, they do not appear to be made up of smaller units of matter. There are six leptons in the present structure, the electron, muon, and tau particles and their associated neutrinos. Particles that do participate in strong interactions are called hadrons. What is Lepton Three generations of matter.Ī lepton is an elementary, half-integer spin (spin 1⁄2) particle that does not undergo strong interactions.

Lepton number