TLD Rings.

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Presentation transcript:

TLD Rings

Thermoluminiscent dosimeters A must for anybody working with radiation sources Rings contain a radiation sensitive lithium fluoride crystal Exposure to radiation energizes electrons and traps them in an excited state Upon heating excited electrons fall back to the ground state and release visible photons Luminiscence is used to determine radiation dose TLD rings DO NOT protect you from radiation!!! http://web.princeton.edu/sites/ehs/dosimeter/dosimetryinfo.htm

Safe practices ALWAYS wear a TLD ring when working with x-ray equipment at the CharFac NEVER leave a TLD ring inside the safety enclosure NEVER take a TLD ring outside the x-ray facility AVOID using multiple rings