Activity
type: QuantityKind
description: $\textit{Activity}$ 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.
applicable unit: BQ
applicable unit: CI
applicable unit: GigaBQ
applicable unit: KiloBQ
applicable unit: KiloCI
applicable unit: MegaBQ
applicable unit: MicroBQ
applicable unit: MicroCI
applicable unit: MilliBQ
applicable unit: MilliCI
applicable unit: NanoBQ
applicable unit: PetaBQ
applicable unit: PicoCI
applicable unit: TeraBQ
dbpedia match: http://dbpedia.org/resource/Radioactive_decay
exact match: RadioactiveDecay
exact match: Radioactivity
has dimension vector: A0E0L0I0M0H0T-1D0
iec61360 code: 0112/2///62720#UAD152
informative reference: https://cdd.iec.ch/cdd/iec62720/iec62720.nsf/ListsOfUnitsAllVersions/0112-2---62720%23UAD152
informative reference: https://en.wikipedia.org/wiki/Radioactive_decay#Radioactive_decay_rates
informative reference: https://en.wikipedia.org/wiki/Radioactive_decay
iso normative reference: http://www.iso.org/iso/catalogue_detail
latex definition: Variation $dN$ of number of nuclei $N$ in a particular energy state, in a sample of a radionuclide, due to spontaneous nuclear transitions from this state during an infinitesimal time interval, divided by its duration $dt$; thus: activity $A = -\frac{dN}{dt}$.
organized under: StochasticProcess
si exact match: ARRN
symbol: A
wikidata match: Q317949
comment: Applicable units are those of quantitykind:Activity
broader: StochasticProcess