-GLOSSARY Absorbed Dose: The absorbed dose of any ionizing radiation is the energy imparted to matter by ionizing radiation per unit mass of irradiated material at the place of interest. The unit of absorbed dose is the rad. One rad is 100 ergs/gram. AEC: Atomic Energy Commission. Ci: Abbreviation for curie. Curie: The guantity of a radioactive nuclide disintegrating at the rate of 3.7x1010 atoms per second. D: Abbreviation for Absorbed Dose. DE: Abbreviation for Dose Fquivalent. DF: Abbreviation for Dose Distribution Factcr. Dose Distribution A modifying factor used in calculating dose equivalent which accounts for nonuniform distribution of radiation. Factor: “ey Dose Equivalent: The product of absorbed dose D, quality factor (QF), dose distribution factor (DP), unit of dose equivalent is the ‘rem.' EPA: FRC: O ~ © the absorbed dose in rads multiplied ‘the appropriate modifying prop Yang factors). (The uU' ¢t and other necessary modifying factors dose equivalent is numerically equal %h ne Environmental Protection Agency. Federal Radiation Council. The FRC has been abolished, and its functions taken over by EPA. g: Abbreviation for gram. Half-life: Time required for a radicactive substiznce to lose 50 percent of its activity by vinloacu te « ee decay. Each radionuclide has a| unlie.b i. ibs life.