Which is the most sensitive and accurate personnel monitoring device?

Which is the most sensitive and accurate personnel monitoring device?

• A. Film badge
• B. Pocket dosimeter
• C. TLD
• D. OSLD

Answer: (C)

The most sensitive and accurate way to monitor a person’s radiation dose is with a thermoluminescent dosimeter (TLD). TLDs use crystals that trap energy from ionizing radiation; when heated, they release that energy as light in proportion to the absorbed dose. This light output provides a highly precise, quantitative measure over a wide dose range, with stable, reproducible results and good energy response, making micro- to high-dose levels measurable with accuracy. They can be stored and later read in a controlled lab process, allowing for reliable archival records and traceable calibrations. While other devices offer real-time readings or rapid results, TLDs excel in sensitivity and accuracy for accumulated dose, which is why they’re favored for personnel monitoring.

The most sensitive and accurate way to monitor a person’s radiation dose is with a thermoluminescent dosimeter (TLD). TLDs use crystals that trap energy from ionizing radiation; when heated, they release that energy as light in proportion to the absorbed dose. This light output provides a highly precise, quantitative measure over a wide dose range, with stable, reproducible results and good energy response, making micro- to high-dose levels measurable with accuracy. They can be stored and later read in a controlled lab process, allowing for reliable archival records and traceable calibrations. While other devices offer real-time readings or rapid results, TLDs excel in sensitivity and accuracy for accumulated dose, which is why they’re favored for personnel monitoring.