2.6.1. Identity

Radionuclide identity is determined by assessing the physical characteristics of the radionuclide emissions. The γ-line at the energy Eγ = 184.6 keV (intensity Iγ = 48.7%) has been used to evaluate the activity of <sup>67</sup>Cu [31]. In order to check that there is no contamination of <sup>67</sup>Ga in the product, we suggest verifying that the same activity of <sup>67</sup>Cu is obtained from both 184.6 keV (48.7%) and the 300.2 keV (0.797%) γ-lines. This additional control is due to the γ-lines emitted by <sup>67</sup>Ga (Eγ = 184.6 keV, Iγ = 21.41% and the Eγ = 300.2 keV, Iγ = 16.64%) having the same energies of <sup>67</sup>Cu but with different intensities [7].
