[en] Results of coincidence study of ⁴He emission with fission fragments in ¹²C (108 MeV) ions with sup(197)Au target and ¹⁶O (144 MeV) ions with sup(223)Th target reactions are presented. On the basis of Monte Carlo kinematic simulation of nuclear reactions analysis of energy and velocity spectra of α-particles has been performed. The conclusion has been performed. The conclusion has been drawn that the main source of ⁴He emission was the evaporation from a fissioning compound nucleus. Substantial part of α-particles was emitted from fully accelerated fission fragments. Some of ⁴He nuclei with mean energy of about 16 MeV emitted mainly perpendicular to the fission axis were identified as similar to long range α-particles in ternary fission of heavy nuclei with low excitation energy. Multiplicities of emission of these particles are considerably higher than those at low excitation energy. Comparison of experimental results with statistical model calculations has been made