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RDF Terms

Activity

Applicable units are those of quantitykind:Activity

$\textit{Activity}$ is the number of decays per unit time of a radioactive sample, the term used to characterise the number of nuclei which disintegrate in a radioactive substance per unit time. Activity is usually measured in Becquerels ($Bq$), where 1 $Bq$ is 1 disintegration per second, in honor of the scientist Henri Becquerel.

http://dbpedia.org/resource/Radioactive_decay

http://en.wikipedia.org/wiki/Mass_number

http://en.wikipedia.org/wiki/Radioactive_decay

http://en.wikipedia.org/wiki/Radioactive_decay#Radioactive_decay_rates

http://www.iso.org/iso/catalogue_detail?csnumber=31895

$A = Z + N$, where $Z$ is the atomic number and $N$ is the neutron number. Variation $dN$ of spontaneous number of nuclei $N$ in a particular energy state, in a sample of radionuclide, due to spontaneous nuclear transitions from this state during an infinitesimal time interval, divided by its duration $dt$, thus $A = -\frac{dN}{dt}$.

A