What type of personal monitor is commonly used to assess exposure to gamma rays?

The thermoluminescent dosimeter (TLD) is commonly used to assess exposure to gamma rays due to its sensitivity and reliability. TLDs contain materials that emit light when exposed to ionizing radiation, including gamma rays. After the TLD has been irradiated, it is heated in a controlled environment, causing it to release the stored energy as light. This light is then measured, providing a quantitative assessment of the radiation exposure.

TLDs are particularly advantageous because they can be reused after being read, are relatively small and lightweight, and can detect a wide range of radiation doses, making them well-suited for monitoring occupational exposure to gamma radiation in various settings. Their ability to give accurate dose readings over a range of exposure conditions adds to their utility in environments where gamma radiation is a concern.

Other personal monitoring devices exist, but they may not offer the same level of specific suitability for assessing gamma ray exposure as the TLD does.