“…In the case of 67 Cu, for example, out of the four promising production reactions, namely 67 Zn(n,p) 67 Cu, 68 Zn(γ ,p) 67 Cu, 70 Zn(p,α) 67 Cu and 68 Zn(p,2p) 67 Cu, the fission spectrum averaged (n,p) cross section is known [cf. 24,25] but it shows some discrepancy with the value integrated from the excitation function. In the case of the (γ ,p) reaction, only the integral yield has been measured [26].…”