Difference between revisions of "Specific activity"
Physchim62 (talk | contribs) (Created page with ''''Specific activity''' is the radioactive activity of a sample per unit mass. In SI units, it is measured in becquerels per kilogram (Bq/kg…') |
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'''Specific activity''' is the [[Radioactivity|radioactive]] [[activity]] of a sample per unit [[mass]]. In [[SI unit]]s, it is measured in [[becquerel]]s per [[kilogram]] (Bq/kg). | '''Specific activity''' is the [[Radioactivity|radioactive]] [[activity]] of a sample per unit [[mass]]. In [[SI unit]]s, it is measured in [[becquerel]]s per [[kilogram]] (Bq/kg). | ||
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| + | ==Definition== | ||
| + | The [[activity (radioactivity)|activity]] ''A'' of a sample is defined as | ||
| + | :<math>A = \lambda N</math> | ||
| + | where ''N'' is the number of radioactive atoms in the sample and ''l'' is the [[decay constant]]. For a sample of mass ''m'', the specific activity is simply ''A''/''m''. | ||
==References== | ==References== | ||
Revision as of 12:43, 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
- <math>A = \lambda N</math>
where N is the number of radioactive atoms in the sample and l is the decay constant. For a sample of mass m, the specific activity is simply A/m.
References
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