title: Semi-empirical relationship for photon buildup factor in soft tissue and water.
abstract: Buildup factor of gamma and X-ray photons in the energy range of 0.2-2 MeV in water and soft tissue is computed using Monte Carlo code MCNP4C. The results are compared with the buildup factor data of pure water. A new relationship estimating buildup factor as a function of penetration depth, Compton scattering and energy absorption cross sections is introduced. The new relationship estimates buildup factor with 5 % deviation compared with the existing data.
authors.affiliation: Islamic Azad University, Science and Research Branch, Tehran, Iran. sardari@srbiau.ac.ir
authors.forename: D
authors.initials: D
authors.lastname: Sardari
authors.forename: S
authors.initials: S
authors.lastname: Baradaran
mesh_terms: D001822:Body Burden; D003198:Computer Simulation; D006801:Humans; D008962:Models, Theoretical; D009010:Monte Carlo Method; D017785:Photons; D012542:Scattering, Radiation; D017695:Soft Tissue Injuries / Q000209:etiology*; D014867:Water
chemical_list: D014867:Water