Cobalt 60 has a half life of 5.26 year. The Cobolt 60 in a certain radiation therapy unit must be replaced whenever its radioactivity falls to 80 percent of the original sample. If the original sample was purchased in 11/2002 when will it be necessary to replace the Cobalt 60?© BrainMass Inc. brainmass.com December 24, 2021, 4:58 pm ad1c9bdddf
The decay of radioactive Cobalt samples are examined. The half life is examined.