When using an OSL dosimeter, what triggers the release of stored radiation energy?

The release of stored radiation energy in an optically stimulated luminescence (OSL) dosimeter is triggered by light, specifically the application of laser light. OSL dosimeters work by trapping electrons in a crystal lattice when they are exposed to ionizing radiation. Over time, energy from this radiation is stored in the material.

When the dosimeter is later stimulated by a specific wavelength of light, primarily from a laser, the trapped electrons are energized and released, resulting in the emission of light. This emitted light is then measured to quantify the amount of radiation exposure that the dosimeter has recorded.

The choice of laser light is key because it provides the precise energy needed to stimulate the electrons without causing further ionization in the dosimeter material, ensuring that the readings reflect only the stored radiation exposure. This mechanism is integral to the function of OSL dosimeters, confirming that option C is the correct response.