Radiation Activity Converter
Radiation Activity Converter Conversion Chart
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About This Tool
This converter is used in nuclear physics, medicine, and radiation safety to convert units of radioactivity (also known as activity). Radioactivity is the process by which an unstable atomic nucleus loses energy by emitting radiation. The base unit is the becquerel (Bq).
The activity of a radioactive sample is a measure of the rate at which its nuclei decay. This tool allows for easy conversion between the modern SI unit and the older, but still common, CGS unit.
Tips & Features
- Becquerel (Bq): The becquerel is the SI unit of radioactivity, defined as one nuclear decay (or disintegration) per second.
- Curie (Ci): The curie is the older CGS unit, originally defined as the activity of one gram of the radium-226 isotope. One curie is a very large amount of activity, equal to 37 billion becquerels.
- Practical Units: Because the becquerel is a very small unit and the curie is very large, prefixes are commonly used. For medical sources, activity is often measured in megabecquerels (MBq) or millicuries (mCi).
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