On the possibility of determining the energy spectra of photon contamination from Schiff formula and generalized simulated annealing algorithm

Clinical electron beams are composed of a mixture of pure electrons and Bremsstrahlung photons. The energy spectrum of clinical electron beam is composed by two components: electronic and photonic components. Photonic component named energy spectrum of photon beam can be obtained through three ways: 1) Modelling source; 2) Direct measurement and 3) Reconstruction. In this article it is proposed an inverse reconstruction method of the energy spectra of photon contamination based on Schiff formula and generalized simulated annealing algorithm.by a semicolon. References should be numbered and quoted according to the order of appearance in the article. (author)