?37ERates of Radioactive Decay (Section)Cobalt-60 is a
Chapter , Problem 37E(choose chapter or problem)
37E
Rates of Radioactive Decay (Section)
Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy unit must be replaced when its radioactivity falls to 75% of the original sample. If an original sample was purchased in June 2013, when will it be necessary to replace the cobalt-60?
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