Gamma rays are a form of nuclear radiation that consists of photons emitted by radioactive elements from the nucleus. This high energetic light emission is also produced from subatomic particle interaction, such as electron positron annihilation. Gamma radiation, similar to x-radiation can injure and destroy tissue, especially cell nuclei.
Gamma rays have in general very high frequencies, short wavelengths, are electrically neutral and penetrate matter. The interaction of gamma rays with matter depends on the nature of the absorber as well as the energy of the gamma rays; these interactions determine also the type and amount of shielding needed for radiation protection.

See also Radiation Safety, Lead Equivalence, Lead Apron, Leaded Glove, Glove-Box, Radioactive Decay Law and Radiation Worker.

A glove-box is an airtight box used to work with dusty, gaseous or radioactive materials to protect against radiation hazards.

See also Radiation Shielding and Absorber.

The thickness of lead affording the same attenuation, under specified conditions, as the material in question. Used as shielding value for e.g. control windows, protective wear, etc.

A leaded glove is used to reduce radiation hazards. Leaded gloves made of materials containing metallic lead or lead compounds, a radiation absorbing material.

See also Glove-Box, Absorber, Radiation Shielding, and Lead Equivalence.

[Whole Body Radiation Counter] Very sensitive device intended to measure even the smallest amount of radionuclides in the entire body. Range usually from Bq to kBq. Heavy shielding is used to keep out naturally existing background radiation.