Characterization of an extrapolation chamber for low-energy X-rays: experimental and Monte Carlo preliminary results

Lucio P Neves; Eric A B Silva; Ana P Perini; Nora L Maidana; Linda V E Caldas

doi:10.1016/j.apradiso.2011.12.012

Characterization of an extrapolation chamber for low-energy X-rays: experimental and Monte Carlo preliminary results

Appl Radiat Isot. 2012 Jul;70(7):1388-91. doi: 10.1016/j.apradiso.2011.12.012. Epub 2011 Dec 10.

Authors

Lucio P Neves¹, Eric A B Silva, Ana P Perini, Nora L Maidana, Linda V E Caldas

Affiliation

¹ 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

PMID: 22182629
DOI: 10.1016/j.apradiso.2011.12.012

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%.