Which of the following is NOT a type of personal radiation monitor?

• A. Optically stimulated luminescence (OSL)
• B. Thermoluminescent dosimeter (TLD)
• C. Electronic personal dosimeter
• D. Pocket dosimeter

Answer: (C)

The correct response identifies that an electronic personal dosimeter is not categorized as a traditional type of personal radiation monitor like the others listed.

Optically stimulated luminescence (OSL) monitors use a special material that, when exposed to ionizing radiation, stores energy. This energy is released as visible light when stimulated by a specific wavelength of light, and the intensity of the light directly correlates to the amount of radiation exposure.

Thermoluminescent dosimeters (TLDs) operate on a similar principle, where radiation exposure causes certain crystals to store energy. Upon heating, these crystals release the trapped energy as light, allowing for measurement of the absorbed dose of radiation.

Pocket dosimeters are small, portable devices that provide immediate readings of radiation exposure. They typically consist of a small ionization chamber and a scale for users to read their exposure levels directly.

In contrast, electronic personal dosimeters operate on electronic principles and often provide real-time monitoring of radiation levels. They can store data digitally and display results immediately to the user, which distinguishes them from the more passive nature of the other monitoring types that require processing after exposure for readings. Thus, while still a type of radiation monitor, the electronic dosimeter differs significantly in its function and operation compared