SILVA, NATALIA F. DAXAVIER, M.VIVOLO, V.CALDAS, L.V.E.2017-09-282017-09-282016SILVA, NATALIA F. DA; XAVIER, M.; VIVOLO, V.; CALDAS, L.V.E. Characterization of a free air ionization chamber for low energy X-rays. <b>Journal of Physics: Conference Series</b>, v. 733, p. 1-5, 2016. DOI: <a href="https://dx.doi.org/10.1088/1742-6596/733/1/012090">10.1088/1742-6596/733/1/012090</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/27804.1742-6588http://repositorio.ipen.br/handle/123456789/27804Free air ionization chambers are used by most primary metrology laboratories as primary standards of the quantities air kerma and exposure in X-ray beams. The free air ionization chamber for low energies of the Calibration Laboratory (LCI) of IPEN showed in a characterization test a problem in the set responsible for the variation of its sensitive volume. After a modification in the support of the micrometers used for the movement of the internal cylinder and the establishment of a new alignment system protocol, the tests were redone. The objective of this work was to present the results obtained in the new condition.1-5openAccesscalibrationionizationstandardsionization chambersairalignmentcylinderskermamodificationsvariationsx radiationArtigo de periódico73310.1088/1742-6596/733/1/012090https://orcid.org/0000-0002-7362-2455