Radioactive decay (AQA A-Level Physics): Flashcards

Random process, can't predict individual nucleus decay

Probability of nucleus decaying per unit time

$N = N_0 e^{-\lambda t}$

Time for half of nuclei in sample to decay

$T_{1/2} = \frac{\ln 2}{\lambda}$

$-\lambda$

Rate of nuclei decay, measured in Becquerels (Bq)

$A = \lambda N$

5730 years

6 hours