Describe the Activity (decay rate) and its units.

1.	Describe the Activity (decay rate) and its units.
Answer» The decay rate R at a certain time t and the number of undecayed nuclei N at the same time are related by R = λN The decay rate of a sample is experimentally measurable quantity and is given a specific name: activity. The SI unit for activity is becquerel, named after the discoverer of radioactivity, Henry Becquerel. 1 becquerel is simply equal to 1 disintegration or decay per second. There is also another unit named “curie” that is widely used and is related to the SI unit as: 1 curie = 1 Ci = 3.7 × 10¹⁰ decays per second = 3.7 × 10¹⁰ Bq.

Answer»

The decay rate R at a certain time t and the number of undecayed nuclei N at the same time are related by R = λN

The decay rate of a sample is experimentally measurable quantity and is given a specific name: activity. The SI unit for activity is becquerel, named after the discoverer of radioactivity, Henry Becquerel.

1 becquerel is simply equal to 1 disintegration or decay per second.

There is also another unit named “curie” that is widely used and is related to the SI unit as:

1 curie = 1 Ci = 3.7 × 10¹⁰ decays per second

= 3.7 × 10¹⁰ Bq.

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