becquerel [Bq] Unit Converter

Definition of becquerel [Bq] unit

The becquerel (Bq) is the SI derived unit of radioactivity, representing one nuclear disintegration or transformation per second. It measures the activity of a radioactive substance, not the energy released.

History of becquerel [Bq] unit

The becquerel was named in honor of French physicist Henri Becquerel, who discovered natural radioactivity in 1896, while investigating uranium salts. The International Committee for Weights and Measures adopted the becquerel as an SI unit in 1975, replacing the curie as the preferred measure of activity. The curie, derived from Marie and Pierre Curie, is much larger, equal to 3.7×10^10 disintegrations per second, whereas one becquerel corresponds to a single transformation each second. Its adoption established a consistent international standard for radiation measurement.

Applications of becquerel [Bq] unit

Becquerels are used to quantify activity in medical radioisotopes, nuclear medicine treatments, diagnostic tracers, laboratory samples, radioactive waste, and environmental monitoring. Clinicians may specify administered activities in megabecquerels (MBq), while smaller quantities can be expressed in kilobecquerels (kBq). Radiation protection professionals use Bq values to assess contamination, instrument performance, and storage or transport requirements.

Complete list of becquerel [Bq] unit conversion