title: Characterization of a homemade ionization chamber for radiotherapy beams.
abstract: A homemade cylindrical ionization chamber was studied for routine use in therapy beams of (60)Co and X-rays. Several characterization tests were performed: leakage current, saturation, ion collection efficiency, polarity effect, stability, stabilization time, chamber orientation and energy dependence. All results obtained were within international recommendations. Therefore the homemade ionization chamber presents usefulness for routine dosimetric procedures in radiotherapy beams.
authors.affiliation: Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Comissão Nacional de Energia Nuclear, Av. Prof. Lineu Prestes 2242, 05508-000 São Paulo, Brazil. lpneves@ipen.br
authors.forename: Lucio P
authors.initials: LP
authors.lastname: Neves
authors.forename: Ana P
authors.initials: AP
authors.lastname: Perini
authors.forename: Gelson P
authors.initials: GP
authors.lastname: dos Santos
authors.forename: Marcos
authors.initials: M
authors.lastname: Xavier
authors.forename: Helen J
authors.initials: HJ
authors.lastname: Khoury
authors.forename: Linda V E
authors.initials: LV
authors.lastname: Caldas
mesh_terms: D011839:Radiation, Ionizing; D011878:Radiotherapy / Q000295:instrumentation*