KOSKINAS, MARINA F.YAMAZAKI, IONE M.BESSA, ANA C.M.CALDAS, LINDA V.E.DIAS, MAURO S.2014-07-152014-07-302014-07-152014-07-302010KOSKINAS, MARINA F.; YAMAZAKI, IONE M.; BESSA, ANA C.M.; CALDAS, LINDA V.E.; DIAS, MAURO S. Comparative measurements in dose calibrators and a gamma-ray spectrometer. <b>Applied Radiation and Isotopes</b>, v. 68, n. 4-5, p. 589-591, 2010. DOI: <a href="https://dx.doi.org/10.1016/j.apradiso.2009.09.010">10.1016/j.apradiso.2009.09.010</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/4726.0969-8043http://repositorio.ipen.br/handle/123456789/4726Specific activity results of 51Cr, 67Ga, 99mTc and 201Tl radioactive solutions, measured in different dose calibrators located at nuclear medicine services and in a calibrated HPGe gamma spectrometer, were compared. The HPGe spectrometer was calibrated in a well defined geometry by means of 60Co, 133Ba, 152Eu, 166mHo and 241Am sources, previously standardized in a 4pbg coincidence system. Despite the observed differences, the results may be accepted within the 10% uncertainty range, established by Brazilian regulatory standards589-591openAccessamericium 241barium 133calibrationchromium 51cobalt 60europium 152gallium 67gamma spectrometershigh-purity ge detectorsnuclear medicineradiation dosesstandardstechnetium 99thallium 201Artigo de periódico4-56810.1016/j.apradiso.2009.09.010https://orcid.org/0000-0003-2478-5757https://orcid.org/0000-0002-7362-2455https://orcid.org/0000-0001-8407-9833