Aluminum oxide is utilized in which of the following radiation-monitoring devices?

Aluminum oxide is the primary material used in Optically Stimulated Luminescent (OSL) dosimeters. These devices function by capturing energy from ionizing radiation and subsequently releasing it as light when stimulated, typically by a laser. When aluminum oxide gets exposed to radiation, it accumulates a luminescent signal proportional to the amount of radiation absorbed. This signal can be read out optically, allowing for precise radiation dose measurements.

OSL dosimeters offer several advantages, such as a wide dose range, reusability, and the ability to measure doses over extended periods. They are particularly beneficial in environments where personal radiation exposure needs to be monitored accurately and reliably.

In contrast, Thermoluminescent Dosimeters (TLDs) use materials like lithium fluoride instead of aluminum oxide for measuring radiation exposure. Ionization chambers and Geiger counters employ different operational principles altogether, relying on electrical measurement of ionized air or gas to detect radiation rather than harnessing luminescence properties.