title: Polarity and ion recombination correction factors for ionization chambers employed in electron beam dosimetry.
abstract: Polarity and ion recombination correction factors for the NACP (type-02) design parallel-plate ionization chamber employed in a recent UK national electron beam dosimetry intercomparison are derived over the full range of energies and measurement conditions encountered. In addition, these effects have been studied for a further four NACP chambers, a Markus parallel-plate chamber, a Roos parallel-plate chamber and a NE2571 graphite walled cylindrical ionization chamber.
authors.affiliation: Department of Medical Physics and Medical Engineering, University of Edinburgh, Western General Hospital, UK.
authors.forename: A
authors.initials: A
authors.lastname: Nisbet
authors.forename: D I
authors.initials: DI
authors.lastname: Thwaites
mesh_terms: D004583:Electrons / Q000627:therapeutic use*; D006108:Graphite; D008962:Models, Theoretical; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000295:instrumentation / Q000379:methods*; D011882:Radiotherapy, High-Energy / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D006113:United Kingdom
chemical_list: D006108:Graphite