The activity of a radioactive source is its rate of decay (rate of loss of atoms).
activity of a radioactive substance at time "t" =
= (activity of the substance at t=0) * (e ^ ((-0.693 / (half life) * (t)))
Each passage of a half-life reduces the amount of activity by half.
1 day = 86,400 seconds
1 year = 31,536,000 seconds
units of radioactive decay:
(1) SI unit: becquerel ("Bq") = 1 decay per second
(2) conventional unit: Curie ("Ci") = 3.7 * (10^10) decay per second
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Specialty: Hematology Oncology
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