title: Characterization of an extrapolation chamber for low-energy X-rays: experimental and Monte Carlo preliminary results.
abstract: The extrapolation chamber is a parallel-plate ionization chamber that allows variation of its air-cavity volume. In this work, an experimental study and MCNP-4C Monte Carlo code simulations of an ionization chamber designed and constructed at the Calibration Laboratory at IPEN to be used as a secondary dosimetry standard for low-energy X-rays are reported. The results obtained were within the international recommendations, and the simulations showed that the components of the extrapolation chamber may influence its response up to 11.0%.
authors.affiliation: Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN), Comissão Nacional de Energia Nuclear, Av. Prof. Lineu Prestes 2242, 05508-000 São Paulo, SP, Brazil. lpneves@ipen.br
authors.forename: Lucio P
authors.initials: LP
authors.lastname: Neves
authors.forename: Eric A B
authors.initials: EA
authors.lastname: Silva
authors.forename: Ana P
authors.initials: AP
authors.lastname: Perini
authors.forename: Nora L
authors.initials: NL
authors.lastname: Maidana
authors.forename: Linda V E
authors.initials: LV
authors.lastname: Caldas