The formation cross sections of cumulatively formed 66Ni, 67Cu, 72Zn, and 73Ga, and of independently formed 68Ga, 70Ga, and 72Ga produced in fission of 238U, induced by protons of energy 20–85 MeV, have been determined. The measured yields correlate well with the data obtained by others at higher energies. From the ratios of the independent and cumulative formation cross sections of 72Ga and 72Zn respectively, a value of Zp, the most probable nuclear charge, for A = 72 was determined for different widths of the charge dispersion curves.