Radiation has been used for a long time in medical therapy
Chapter , Problem 35(choose chapter or problem)
Radiation has been used for a long time in medical therapy to control the development and growth of cancer cells. Cobalt-60, a gamma emitter that emits photons that have energies of and is used to irradiate and destroy deep-rooted cancers. Small needles made of of a specified activity are encased in gold and used as body implants in tumors for time periods that are related to tumor size, tumor cell reproductive rate, and the activity of the needle. (a) A 1.00-mg sample of 60Co, that has a half-life of and that is used to irradiate a small internal tumor with gamma rays, is prepared in the cyclotron of a medical center. Determine the activity of the sample in curies. (b) What will the activity of the sample be from now?
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