YAMAZAKI, I.M.KOSKINAS, M.F.MOREIRA, D.S.TAKEDA, M.N.DIAS, M.S.2018-02-072018-02-072018YAMAZAKI, I.M.; KOSKINAS, M.F.; MOREIRA, D.S.; TAKEDA, M.N.; DIAS, M.S. Disintegration rate and gamma-ray emission probability per decay measurement of Cu-64. <b>Applied Radiation and Isotopes</b>, v. 134, p. 312-315, 2018. SI. DOI: <a href="https://dx.doi.org/10.1016/j.apradiso.2017.09.007">10.1016/j.apradiso.2017.09.007</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/28459.0969-8043http://repositorio.ipen.br/handle/123456789/28459The procedure followed by the Nuclear Metrology Laboratory (LMN) at the IPEN for the standardization of activity of 64Cu is described. The measurement was carried out in a 4π (PC) β-γ coincidence system. The activity per unit mass of the solution was determined by the extrapolation technique. The events were registered using a Time to Amplitude Converter (TAC) associated with a Multi-channel Analyzer. The gamma-ray emission probability per decay of the 1345.7 keV transition of 64Cu determined with a calibrated REGe gamma-ray spectrometer was (0.472±0.010) %, in agreement with the literature.312-315openAccesscoincidence methodscopper 64emissiongamma radiationgamma spectrometersmulti-channel analyzersstandardizationtantalum carbidesArtigo de periódico134SI10.1016/j.apradiso.2017.09.007https://orcid.org/0000-0003-2478-5757https://orcid.org/0000-0001-8407-983338.2253.00