Difference between revisions of "Specific activity"
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==Definition== | ==Definition== | ||
| − | The [[ | + | The [[Activity (radioactivity)|activity]] ''A'' of a sample is defined as |
| − | : | + | :''A'' = d''N''/d''t'' = ''λN'' |
| − | where ''N'' is the number of radioactive atoms in the sample and '' | + | where ''N'' is the number of radioactive atoms in the sample and ''λ'' is the [[decay constant]]. For a sample of mass ''m'', the specific activity is simply ''A''/''m''. |
==References== | ==References== | ||
Revision as of 11:46, 12 March 2010
Specific activity is the radioactive activity of a sample per unit mass. In SI units, it is measured in becquerels per kilogram (Bq/kg).
Definition
The activity A of a sample is defined as
- A = dN/dt = λN
where N is the number of radioactive atoms in the sample and λ is the decay constant. For a sample of mass m, the specific activity is simply A/m.
References
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