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cobalt 60

noun

, Chemistry.
  1. a radioactive isotope of cobalt having a mass number of 60 and a half-life of 5.2 years, used chiefly in radiotherapy.

cobalt 60

  1. A radioactive isotope produced when neutrons bombard atoms of the element cobalt.

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Notes

Cobalt 60 is a common substance used in radiation therapy for cancer .

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Word History and Origins

Origin of cobalt 601

First recorded in 1945–50

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Example Sentences

Nothing happened although the board showed the gauge's cobalt-60 beta and gamma still hot.

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