[en] The reactions of light nuclei deep disintegration are studied. The target irradiation was performed on a synchrocyclotron extracted proton beam. Cross sections of the ⁷Be production on ⁹Be, ¹⁰B, ¹¹B, ²³Na, Si (chemically pure) and S (chemically pure) nuclei were measured by the gamma-spectrometric method at proton energies 0.66 and 1.0 GeV. Chemically pure polyethylene, polystyrene and aluminium were the monitors. The data on the ⁷Be production on the light nuclei isotopes were collected and analyzed. The similar tendencies appear in the ⁷Be production isotopic dependences as a residual nucleus and in the isotopic dependences of the ⁷Be production cross sections as a fragment. The refined formulae of approximation of residual nuclei and fragment production cross sections are obtained