Technetium-99m is a metastable nuclide used in numerous cancer diagnostic and treatment
Chapter 24, Problem 24.102(choose chapter or problem)
Technetium-99m is a metastable nuclide used in numerous cancer diagnostic and treatment programs. It is prepared just before use because it decays rapidly through g emission: 99mTc - 99Tc 1 g Use the data below to determine (a) the half-life of 99mTc; (b) the percentage of the isotope that is lost if it takes 2.0 h to prepare and administer the dose. Time (h) g Emission (photons/s) 0 5000. 4 3150. 8 2000. 12 1250. 16 788 20 495
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