This particle is emitted in beta-minus decay and is the antiparticle of the positron.
These particles are captured to lower the atomic number of an atom in K-capture, a type of radioactive decay. This particle belongs to the same class as the tau particle and the muon. The discoverer of these particles compared their deflection by a magnetic field and an electric field to determine their high charge-to-mass ratio; that discoverer used a cathode-ray tube and was J. J. Thomson. This particle is emitted in beta-minus decay and is the antiparticle of the positron. For 10 points, name this lepton, a negatively-charged particle that orbits the atomic nucleus.
These particles are captured to lower the atomic number of an atom in K-capture, a type of radioactive decay.
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