What does the dosimetry badge (TLD) primarily record?

The dosimetry badge, commonly known as a thermoluminescent dosimeter (TLD), is designed to measure and record exposure to ionizing radiation, particularly gamma and beta radiation. The TLD contains materials that can absorb radiation energy, which is then released as light upon heating. The intensity of the emitted light is proportional to the amount of radiation exposure the badge has received.

Gamma rays and beta particles are both forms of ionizing radiation, and the TLD is effective in detecting both due to its sensitivity to a wide range of radiation types. In practice, the TLD is commonly used in environments where monitoring of personnel exposure to radiation is necessary, such as in medical facilities, research labs, and nuclear power plants.

In contrast, while other forms of radiation, such as alpha and X-ray, may be relevant in certain contexts, the TLD is primarily calibrated to measure the dose from gamma and beta radiation, which are the most common forms of radiation encountered in various occupational settings.