[en] Peripheral interactions of 12C nuclei with protons and carbon nuclei have been investigated in a 2m-propane bubble chamber at 4.2 GeV/c per nucleon. Energetic and angular characteristics of γ-quanta accompanying the production of multicharged fragments with Zsub(f)=5 and 6 have been analyzed. It is shown that in the fragment rest system there is an excess of γ-quanta with Esub(γ) < 40 MeV over the background from known sources (π0 → 2γ decays, bremsstrahlung and so on)