How does radiation leak from a parked 60 Co machine?

The process of radiation leakage from a parked cobalt-60 (60Co) machine primarily occurs due to residual radioactivity. After a cobalt-60 source has been used in treatment, it doesn't immediately become inert or devoid of radiation. Instead, residual radioactivity may remain even when the machine is not actively in use. This residual activity is a key consideration in radiation safety protocols.

The cobalt-60 source emits gamma radiation, which can persist in the environment around the machine. Therefore, understanding and managing this residual radioactivity is crucial to ensuring safety for patients, medical personnel, and the surrounding area. Proper shielding and safety measures help mitigate the exposure risks associated with this residual activity.

This aspect of residual radioactivity highlights the importance of regular monitoring and appropriate safety procedures in facilities utilizing cobalt-60 machines to avoid unnecessary radiation exposure.