Which radiation monitoring system provides information over a longer duration than a single exposure?

Thermoluminescent dosimeters (TLDs) are designed to measure exposure to ionizing radiation over a longer duration than just a single exposure. TLDs use specific crystal materials that absorb energy from radiation exposure. When these crystals are heated, they release the stored energy in the form of light. The amount of light emitted is directly proportional to the radiation exposure received.

This characteristic allows TLDs to effectively accumulate doses over time, making them suitable for monitoring cumulative exposure levels. They can be worn for weeks or even months, providing a comprehensive record of individual exposure rather than just a snapshot from a single moment, which is beneficial for radiation protection and safety protocols.

In contrast, instant reading dosimeters typically provide immediate readings of radiation levels but are not used for long-term dose measurement. Radiation survey meters serve primarily for real-time measurements of radiation levels in an environment rather than tracking individual exposure over time. Film badges, while they do record exposure over a longer period, are less sensitive and can degrade over time, making TLDs a more reliable choice for prolonged monitoring.