Many radioisotopes have important industrial, medical, and research applications. One of these is Cobalt-60, which has...

Many radioisotopes have important industrial, medical, and research applications. One of these is Cobalt-60, which has a half-life of 5.20 years and decays by the emission of a beta particle (energy 0.31 MeV) and two gamma photons (energies 1.17 MeV and 1.33 MeV). A scientist wishes to prepare a Cobalt-60 sealed source that will have an activity of at least 10 Ci after 30 months of use.

i. What minimum initial mass of Cobalt-60 is required? [6 marks]

ii. At what rate will the source emit energy after 30 months?

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genius_generous answered 2 years ago

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