title: A TPD and AR based comparison of accelerator neutron irradiation fields between (7)Li and W targets for BNCT.
abstract: The characteristics of moderator assembly dimension was investigated for the usage of (7)Li(p,n) neutrons by 2.3-2.8MeV protons and W(p,n) neutrons by 50MeV protons. The indexes were the treatable protocol depth (TPD) and advantage depth (AD). Consequently, a configuration for W target with the Fe filter, Fluental moderator, Pb reflector showed the TPD of 5.8cm and AD of 9.3cm. Comparable indexes were found for the Li target in a geometry with the MgF2 moderator and Teflon reflector.
authors.affiliation: Center of Medical Education, Sapporo Medical University, Sapporo, Japan. Electronic address: tanakaken@sapmed.ac.jp.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tanaka
authors.affiliation: Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Endo
authors.affiliation: Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Yonai
authors.affiliation: Cyclotron Radioisotope Center, Tohoku University, Miyagi, Japan.
authors.forename: Mamoru
authors.initials: M
authors.lastname: Baba
authors.affiliation: Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, Japan.
authors.forename: Masaharu
authors.initials: M
authors.lastname: Hoshi
mesh_terms: D016754:Boron Neutron Capture Therapy / Q000295:instrumentation*; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008094:Lithium / Q000737:chemistry / Q000528:radiation effects*; D015233:Models, Statistical; D009502:Neutrons; D010315:Particle Accelerators / Q000295:instrumentation*; D011874:Radiometry; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D012542:Scattering, Radiation; D014414:Tungsten / Q000737:chemistry / Q000528:radiation effects*
chemical_list: D008094:Lithium; D014414:Tungsten
keywords: Accelerator; BNCT; Irradiation field; Li target; W target