Co-60 is a strong gamma emitter that is used in radiotherapy units and must be replacedwhen its radioactivity falls below 75% of the original value. It has a half-life 0f 5.26 years. Ifthe radiotherapy unit was charged with a new sample of Co-60 in Sept 2016, when will it benecessary to be replaced?

Co-60 is a strong gamma emitter that is used in radiotherapy units and must be replacedwhen its radioactivity falls below 75% of the original value. It has a half-life 0f 5.26 years. Ifthe radiotherapy unit was charged with a new sample of Co-60 in Sept 2016, when will it benecessary to be replaced?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter31: Radioactivity And Nuclear Physics

Section: Chapter Questions

Problem 12PE: If a 1.50cmthick piece of lead can absorb 90.0% of the rays from a radioactive source, how many...

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