Summary
The notes provide a detailed overview of dosimetry, the study of ionizing radiation exposure, highlighting key dosimetric quantities such as absorbed dose, equivalent dose, and effective dose, along with their respective rates of delivery. They also differentiate between natural and technogenic sources of ionizing radiation, and discuss the distinctions between external and internal irradiation. These concepts are crucial for accurately assessing radiation exposure and managing its biological effects in medical and environmental contexts
Dosimetry Quantities
Absorbed Dose (D): Energy imparted by radiation per unit mass of tissue, measured in grays (Gy). Calculated withh D=dE/dm. .
Power of Absorbed Dose (PD): Rate at which absorbed dose is delivered, measured in Gy/s.
Exposure (X): Ionization in air caused by X or gamma rays, measured in coulombs per kilogram (C/kg).
Power of Exposure (Px): Rate of exposure delivery, measured in (C/kg)/s.
Equivalent Dose (H): Reflects different biological effects of radiation types, calculated as \( H = WR \cdot D \), measured in sieverts (Sv).
Power of Equivalent Dose (PH): Rate at which equivalent dose is delivered, measured in Sv/s.