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Transcript

Evolution temporelle d'une population de noyau radioactifs

Evolution temporelle d'une population de noyau radioactifs

Question 1
Question 4

137 137 0 CS Ba + e 55 56 -1

Question 2

Valeur de = 3.52x10E-3 Valeur de t1/2 = 197 secondes

N(t)= N0 / 2 => t1/2=ln(2) : L L= ln(2 )/ t1/2

Question 3

Equation de desinteraction radioactive dN(t)/dt = -L . N(t) derive proportionelle au noyaux restant le -L traduit une decroissance