Radioactive cobalt-60 is used extensively in nuclear medicine as a ɣ-ray source. It is made by a neutron capture reaction from cobalt-59 and is a ß-emitter; ß emission is accompanied by strong ɣ radiation. If the half-life of Co-60 is 5.27 years: a. How long will it take for the Co-60 source to decrease to one-eighth of its original amount? b. What percent (rounded to two decimal places) of Co-60 source will remain after 3 years?
Radioactive cobalt-60 is used extensively in nuclear medicine as a ɣ-ray source. It is made by a neutron capture reaction from cobalt-59 and is a ß-emitter; ß emission is accompanied by strong ɣ radiation. If the half-life of Co-60 is 5.27 years: a. How long will it take for the Co-60 source to decrease to one-eighth of its original amount? b. What percent (rounded to two decimal places) of Co-60 source will remain after 3 years?
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter25: Nuclear Chemistry
Section: Chapter Questions
Problem 47PS
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Radioactive cobalt-60 is used extensively in nuclear medicine as a ɣ-ray source. It is made
by a neutron capture reaction from cobalt-59 and is a ß-emitter; ß emission is accompanied
by strong ɣ radiation. If the half-life of Co-60 is 5.27 years:
a. How long will it take for the Co-60 source to decrease to one-eighth of its original
amount?
b. What percent (rounded to two decimal places) of Co-60 source will remain after 3 years?
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