What is indicated by the term Counts per Minute (CPM)?

Counts per Minute (CPM) refers specifically to the measurement of the number of radioactive decays or events detected by a radiation detection instrument within one minute. This measurement is crucial in radiological assessments because it directly quantifies the activity of radioactive material in the environment. A higher CPM indicates a greater level of radioactive decay occurring in that particular period, reflecting higher radioactivity.

In the context of radiological safety and monitoring, understanding CPM is essential for evaluating radiation levels and determining potential exposure risks. It allows professionals to monitor changes in radioactivity and make informed decisions regarding safety protocols and interventions. While other measurements, such as radiation exposure levels, intensity of gamma radiation, and the amount of shielding required, are important in radiation safety, they pertain to different aspects of radiation measurement and do not directly define what counts per minute measures.