Photospallation of the isotope 65Cu

The induced-activity method has been used to investigate the spallation of the enriched isotope 65Cu by photons with maximum energy 4.5 GeV with various target thicknesses. The photon-induced yields from the isotopes 65Cu were calculated with use of earlier data on the photospallation of copper with the natural isotopic composition. Comparison of the experimental yield values with the estimate according to the Rudstam formula confirmed the previously established dependence of the yields of residual nuclei on the isospins of the initial and final nuclei. Absolute values of the yields of the (γ,π+) reactions in 65Cu and 27Al with inclusion of the contribution of secondary reactions were also obtained