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10 cards from this deck
Unstable nuclei break down & emit radiation
Time for half the nuclei to decay
Impossible to predict
Nt=N0e−λtN_t = N_0 e^{-\lambda t}Nt=N0e−λt
λ=ln2t1/2\lambda = \frac{\ln 2}{t_{1/2}}λ=t1/2ln2
s−1\text{s}^{-1}s−1
Less than 5%
Nt=N0(1/2)nN_t = N_0 (1/2)^nNt=N0(1/2)n
Minimizes patient radiation exposure
Exponential not linear
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