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  • Title: 57Co half-life determination.
    Author: da Silva CJ, Iwahara A, Moreira DS, Delgado JU, Gomes RS.
    Journal: Appl Radiat Isot; 2012 Sep; 70(9):1924-6. PubMed ID: 22406221.
    Abstract:
    The National Laboratory for Metrology of Ionizing Radiation (LNMRI)/Brazil participated in the last (57)Co activity measurement comparison organized by IAEA, in 2008. This was made in order to realize primary standardization of this radionuclide and to reduce the measuring uncertainties in the laboratory. Additionally, one sample with 2.6g was taken from the IAEA master solution of (57)Co and was prepared to be used in the measurement of the radionuclide's half-life in an ionization chamber system. The (57)Co half-life was measured to be 271.82 (17) days.
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