In what unit is radioactivity commonly measured?

Radioactivity is commonly measured in Becquerels (Bq), which is the standard unit of measurement in the International System of Units (SI) for nuclear activity. One Becquerel represents one disintegration or decay event per second, indicating the rate at which a radioactive substance emits radiation.

This unit focuses specifically on the count of radioactive decay processes occurring, making it essential for quantifying the activity level of radionuclides. Unlike other units that measure radiation exposure or biological effects, such as Gray (Gy) and Sievert (Sv), the Becquerel provides a direct measurement of radioactivity itself. Consequently, it is the most appropriate choice for assessing the activity of radioactive materials.