Difference between revisions of "Activity"
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===About Activity=== | ===About Activity=== | ||
| − | *[[Measure]]d in [[ | + | *[[Measure]]d in [[becquerel]]s (Bq), where 1 Bq equals one disintegration per [[second]]. |
*Indicates the rate at which a sample of [[radioactive]] [[material]] [[Decay (Physics)|decays]]. | *Indicates the rate at which a sample of [[radioactive]] [[material]] [[Decay (Physics)|decays]]. | ||
*Higher [[activity]] means more frequent emissions of [[radiation]]. | *Higher [[activity]] means more frequent emissions of [[radiation]]. | ||
| + | *[[Activity]] decreases over [[time]] as the [[radioactive]] [[material]] [[Decay (Physics)|decays]]. | ||
| + | *Related to the half-life of the [[radioactive]] [[isotope]], which is the [[time]] taken for half of the [[isotope]] to [[Decay (Physics)|decay]]. | ||
| + | *[[Activity]] can also be [[measure]]d in [[Curie]]s (Ci), where 1 Ci = 3.7 x 10<sup>10</sup> disintegrations per [[second]]. | ||
| + | *[[Activity]] is used in various applications including medical imaging, cancer treatment, and radiometric dating. | ||
| + | |||
===Examples=== | ===Examples=== | ||
*Medical tracers have high [[activity]] to ensure they [[emit]] detectable [[radiation]] within a short [[time]]. | *Medical tracers have high [[activity]] to ensure they [[emit]] detectable [[radiation]] within a short [[time]]. | ||
*[[Radon]] detectors [[measure]] the [[activity]] of [[radon]] gas in homes to assess safety. | *[[Radon]] detectors [[measure]] the [[activity]] of [[radon]] gas in homes to assess safety. | ||
Latest revision as of 10:57, 22 May 2024
Key Stage 5
Meaning
In radioactivity, activity is the number of disintegrations per second of a radioactive isotope.
About Activity
- Measured in becquerels (Bq), where 1 Bq equals one disintegration per second.
- Indicates the rate at which a sample of radioactive material decays.
- Higher activity means more frequent emissions of radiation.
- Activity decreases over time as the radioactive material decays.
- Related to the half-life of the radioactive isotope, which is the time taken for half of the isotope to decay.
- Activity can also be measured in Curies (Ci), where 1 Ci = 3.7 x 1010 disintegrations per second.
- Activity is used in various applications including medical imaging, cancer treatment, and radiometric dating.