#nuclear_reaction__nuclearreaction  a process that alters the energy or structure or composition of atomic nuclei
  supertype:  natural_process__naturalproces__natural_action__naturalaction__action__activity  a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
  subtype:  chain_reaction.nuclear_reaction__chainreaction  a self-sustaining nuclear reaction; a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others
  subtype:  radioactive_decay__radioactivedecay__decay__disintegration  the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
  subtype:  endoergic_reaction__endoergicreaction  a nuclear reaction occurring with absorption of energy
  subtype:  exoergic_reaction  a nuclear reaction accompanied by the evolution of energy
  subtype:  nuclear_fission__fission  a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
  subtype:  nuclear_fusion_reaction__fusion__nuclear_fusion__nuclearfusion  a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
     subtype:  cold_fusion  nuclear fusion at or near room temperatures; claims to have discovered it are generally considered to have been mistaken
     subtype:  thermonuclear_reaction__thermonuclearreaction  a nuclear fusion reaction taking place at very high temperatures (as in the sun)
        subtype:  carbon_cycle  a thermonuclear reaction in the interior of stars

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