Activity of a radioactive sample
From WikiLectures
The quantity characterizing the amount of a radionuclide activity according to the frequency of radioactive transformations occurring in it was called Activity.
By the activity of a radioactive sample we mean the number of radioactive nuclei that transform in one second. The activity of the sample decreases exponentially with time, the unit is 1 s -1 . This unit is too general, so a resolution was passed in May 1975 that the 1 s -1 unit for activity would be called the becquerel (Bq). A radioactive sample has an activity of 1 Bq if 1 radioactive nucleus is transformed in it in 1 second. The unit of absorbed dose is gray (Gy), the unit of dose equivalent is sievert (Sv).
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- KYMPLOVÁ, Jaroslava. Katalog metod v biofyzice [online]. [cit. 2012-09-20]. <https://portal.lf1.cuni.cz/clanek-793-katalog-metod-v-biofyzice>.
