Kats Final on the 9th -2

National Council on Radiation Protection and Measurements (NCRP)

International Commission on Radiological Protection (ICRP)

10 mSv × age (1000 mrem × age)

Annual: 50 mSv (5000 mrem)

• / TLD
• /OSL

lithium fluoride (LiF) in crystalline form, either as a powder or more often as a small chip. When exposed to x-rays, the TLD absorbs energy and stores it in the form of excited electrons in the crystalline lattice. The intensity of visible light is measured with a photomultiplier tube or photodiode and is proportional to the radiation dose received by the crystal.

OSL dosimeters are worn and handled just as film badges and TLDs are, and they are approximately the same size. OSL dosimeters have one advantage over TLDs. They are more sensitive, measuring as low as 10 µGya (1 mR).