title: Optimization of irradiation conditions for photon activation analysis of biological and environmental samples using a high power electron accelerator.
abstract: Using the bremsstrahlung flux density data of Tanaka et al. (1983), the PHOTAC code has been developed to calculate the activity induced in a sample during photon activation as a function of the geometrical arrangement of the electron energy and the beam profile. Some results are given for sample volumes from 1 to 1000 cm3 and sample distances from 1 to 10 cm at 25 MeV. Examples for the application of the PHOTAC code to estimate the maximum activity output and to minimize the heating up of the sample during irradiation are discussed.
authors.affiliation: Klinik und Poliklinik für Nuklarmedizin, Universität Leipzig, Germany.
authors.forename: H W
authors.initials: HW
authors.lastname: Thümmel
authors.forename: C
authors.initials: C
authors.lastname: Segebade
authors.forename: K
authors.initials: K
authors.lastname: Hirsch
mesh_terms: D000201:Activation Analysis / Q000379:methods*; D004583:Electrons; D005740:Gases / Q000032:analysis; D010315:Particle Accelerators; D017785:Photons; D014875:Water Pollutants, Radioactive / Q000032:analysis
chemical_list: D005740:Gases; D014875:Water Pollutants, Radioactive