termoluminesentsdetsid

Termoluminescentni detektori, often abbreviated as TLDs, are passive dosimeters used to measure ionizing radiation. They work by trapping energy from radiation within a crystal lattice. When these crystals are heated, the trapped energy is released in the form of light, the intensity of which is proportional to the amount of radiation absorbed. This light is then measured by a photodetector, typically a photomultiplier tube, and converted into an electrical signal that can be quantified to determine the absorbed radiation dose.

The materials used in TLDs are typically inorganic phosphors, such as lithium fluoride (LiF) doped with magnesium and titanium, or calcium fluoride (CaF2) doped with certain rare earth elements. These materials are chosen for their ability to efficiently store energy from ionizing radiation and for their stability. TLDs are widely used in various applications, including personnel dosimetry for radiation workers in nuclear facilities and medical settings, environmental monitoring, and quality assurance in radiotherapy. Their advantages include reusability, good energy response, and the ability to measure a wide range of radiation doses. After reading, the TLD crystals can be annealed at high temperatures to remove the trapped charge, allowing them to be reused for subsequent measurements.