What does an optically stimulable luminescent (OSL) dosimeter typically measure?

An optically stimulable luminescent (OSL) dosimeter is specifically designed to measure the total occupational dose of radiation exposure over a period, often spanning several months. This type of dosimeter works by detecting the amount of ionizing radiation that interacts with the material inside it, typically aluminum oxide. When this material is exposed to radiation, it stores energy in the form of luminescence. Upon stimulation by laser light, the stored energy is released as visible light, and the intensity of this light is proportional to the amount of radiation exposure.

The OSL dosimeter is particularly beneficial for monitoring personnel who work in environments where they may be exposed to radiation, as it can provide a cumulative reading over time. This allows for better assessment of safety and ensuring that exposure limits are not exceeded. OSL dosimeters are favored in occupational settings due to their sensitivity, wide dose range, and the ability to be read at a later date, which supports the ongoing monitoring of radiation exposure for workers.

In contrast, the other options either refer to immediate measurements or do not capture the cumulative effect that the OSL dosimeter is designed to provide.