Which of the following materials in an OSLD becomes luminescent during reading?

In an optically stimulated luminescent dosimeter (OSLD), the material that becomes luminescent during the reading process is aluminum oxide. When aluminum oxide is exposed to ionizing radiation, it traps electrons in its crystal lattice. During the reading phase, when the dosimeter is stimulated by a specific light source, these trapped electrons are released and recombine, resulting in the emission of light. This emitted light is then measured to determine the amount of radiation exposure.

Aluminum oxide’s effectiveness in this process is due to its ability to store energy and release it as luminescence in a controlled manner, making it one of the preferred materials for use in OSLD applications. The precise properties of aluminum oxide allow for accurate measurements and a wide dynamic range of radiation detection, which is essential in various fields including radiation safety and monitoring.