A
unit of radiation; the
radiation produced by a
gram of
radium in one second. 1 Ci = 37 billion disintegrations per second (
dps). Also, a quantity of
radionuclide that decays at 37 billion dps.
TMI released about 5 curies; the 1949 Green Run at Hanford released about 11,000 curies. Named for Pierre Curie, husband of Marie Curie.