Cobalt-60 is used in cancer radiation treatments and is the isotope used in the gamma knife. Assume cobalt-60 has a half-life much greater than many months. Cobalt-60 has a mass of 59.93 amu. For a one microgram sample of cobalt-60, a detector counts 4.19 × 10^7 disintegrations every second. Calculate the half-life of cobalt-60, and give your answer in years.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter18: Nuclear Chemistry
Section: Chapter Questions
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Cobalt-60 is used in cancer radiation treatments and is the isotope used in the gamma knife. Assume cobalt-60 has a half-life much greater than many months. Cobalt-60 has a mass of 59.93 amu. For a one microgram sample of cobalt-60, a detector counts 4.19 × 10^7 disintegrations every second. Calculate the half-life of cobalt-60, and give your answer in years.
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