Science: The New Particles and Their Radiations
When most of us went to school there were only two kinds of elementary particles, perhaps three: protons, electrons, neutrons. There was only one kind of radiation—electromagnetic radiation—although if we counted any stream of particles with analogous properties, fast electrons could be called beta radiation and the compound particles which form the nucleus of the helium atom were a third kind, alpha radiation.
KeywordsFast Electron Helium Atom Rock Salt Light Quantum Compound Particle
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