Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 11, Problem 11.19P
Iodine-125 waste, whose half-life is 60 days, is to be disposed of by allowing it to decay away. How long must it be allowed to decay before its activity is reduced by 99.99%?
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