What instrument is typically used for personal dosimetry?

The instrument typically used for personal dosimetry is the ionization chamber. This device measures the amount of ionizing radiation absorbed by an individual, which is critical for monitoring radiation exposure levels in a professional setting. It works by detecting the ion pairs created when radiation interacts with the air within the chamber. The ionization chamber can provide accurate readings of dose rates over time, ensuring that individuals working in environments with potential radiation exposure can be monitored effectively to assess whether they are within safe limits.

Other instruments may have their specific applications but do not serve the primary purpose of personal dosimetry. For instance, a Geiger counter is mainly used for detecting and measuring radiation levels in the environment but is not tailored for individual dose monitoring. A thermal imaging camera is employed in different contexts, typically for temperature measurement and does not measure radiation exposure. Smartphone apps may offer some radiation detection capabilities; however, they generally lack the precision and reliability needed for formal personal dosimetry.