Alpha Particles Alpha particles (symbol α ) are a type of ionizing radiation ejected by the nuclei of some unstable atoms. They are large subatomic fragments consisting of two protons and two neutrons. Alpha Emitter Atomic Number americium-241 95 plutonium-236 94 uranium-238 92 thorium-232 90 radium-226 88 radon-222 86 polonium-210 84
Beta Particles There are many beta emitters: tritium cobalt-60 strontium-90 technetium-99 iodine-129 iodine-131 cesium-137 Beta particles are subatomic particles ejected from the nucleus of some radioactive atoms. They are equivalent to electrons. The difference is that beta particles originate in the nucleus and electrons originate outside the nucleus.
Gamma Rays A gamma ray is a packet of electromagnetic energy--a photon. Gamma photons are the most energetic photons in the electromagnetic spectrum. Gamma rays (gamma photons) are emitted from the nucleus of some unstable (radioactive) atoms. Gamma emitting radionuclides are the most widely used radiation sources. cobalt-60, cesium-137, technetium-99 m.
Nuclear Energy Electricity was generated for the first time by a nuclear reactor on December 20, 1951, at the EBR-I experimental station near Arco, Idaho, which initially produced about 100 kW (the Arco Reactor was also the first to experience partial meltdown, in 1955).
Nuclear Energy Russia's first nuclear power plant, and the first in the world to produce electricity, was the 5 MWe Obninsk reactor, in 1954.
- Fall '19
- Nuclear Fission