title: Air activation produced by high-energy medical accelerators.
abstract: The activity of 15O and 13N per unit volume of air produced by a 25 and a 45-MeV medical accelerator was determined by direct measurement. The accelerators were operated in such a fashion as to produce maximum activation of the treatment room air. Levels of the order of 1% or less of the maximum permissible concentration in air for 15O and 13N were found immediately after accelerator shutdown. Three different techniques for calibrations of the air detector were investigated.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis*; D008452:Maximum Allowable Concentration; D009590:Nitrogen Radioisotopes / Q000032:analysis*; D010104:Oxygen Radioisotopes / Q000032:analysis*; D010315:Particle Accelerators
chemical_list: D009590:Nitrogen Radioisotopes; D010104:Oxygen Radioisotopes