Assertion: cobalt's isotope | /r/HasAspect | half-life of 5.3 years
Facets:
Source sentences:
text: The gamma rays emitted have energies of 1.173 and 1.333 MeV and the isotope has a half-life of 5.3 years.
text: The cobalt-60 isotope has a half-life of 5.3 years so the cobalt-60 needs to be replaced occasionally.