COSTA, OSVALDO L. daSOUZA, DAIANE C.B. deCASTANHO, FABIO G.FEHER, ANSELMOMOURA, JOÃO A.SOUZA, CARLA D.OLIVEIRA, HENRIQUE B.MADUAR, MARCELO F.ZEITUNI, CARLOS A.ROSTELATO, MARIA E.C.M.2021-04-062021-04-062021COSTA, OSVALDO L. da; SOUZA, DAIANE C.B. de; CASTANHO, FABIO G.; FEHER, ANSELMO; MOURA, JOÃO A.; SOUZA, CARLA D.; OLIVEIRA, HENRIQUE B.; MADUAR, MARCELO F.; ZEITUNI, CARLOS A.; ROSTELATO, MARIA E.C.M. Gamma spectrometry of iodine-125 produced in IEA-R1 nuclear reactor, using HPGe detector and fixation into epoxy matrix disc. <b>Applied Radiation and Isotopes</b>, v. 169, p. 1-6, 2021. DOI: <a href="https://dx.doi.org/10.1016/j.apradiso.2020.109568">10.1016/j.apradiso.2020.109568</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31972.0969-8043http://repositorio.ipen.br/handle/123456789/31972Few places in the world produce iodine-125. In Brazil, the first production was achieved by using the IEA-R1 nuclear reactor located at Nuclear and Energy Research Institute – IPEN. To verify the quality of iodine-125 produced, and the amount of contaminants such as iodine-126, cesium-134 and caesium-137 among others, iodine-125 samples were immobilized into epoxy matrix disc, with the same geometry of a barium-133 reference radioactive source, used to calibrate an HPGe detector. The HPGe detector has a thin carbon composite window, which allows measure the iodine-125 photopeaks, between 27.1 and 35.4 keV. The method employed here was successful in producing and measurement of iodine-125.1-6openAccesscontaminationgamma spectroscopyhigh-purity ge detectorsiodine 125irradiationquality controlvolatilitybrazilian cnenArtigo de periódico16910.1016/j.apradiso.2020.1095680000-0003-2943-60970000-0002-7303-67200000-0002-3442-68300000-0001-5989-7287https://orcid.org/0000-0002-5054-0799https://orcid.org/0000-0003-2943-6097https://orcid.org/0000-0002-7303-6720https://orcid.org/0000-0002-4448-003Xhttp://orcid.org/0000-0003-1335-886436.1245.00