title: Determination of the photon spectrum of a clinical accelerator.
abstract: An experiment to determine the peak of the energy spectrum of the photon beam from a Toshiba LMR-15 medical linear accelerator is described. It is found that the flattening filters removed much of the bremsstrahlung spectrum below approximately 1 MeV, resulting in a photon spectrum which peaks around 1.2 MeV.
mesh_terms: D010315:Particle Accelerators; D011882:Radiotherapy, High-Energy / Q000295:instrumentation*; D013679:Technology, Radiologic