Direct mechanisms of fast light particle formation in heavy ion collisions

Two direct mechanisms are considered for the heavy ion collisions which lead to fast α-particle emission: α-particle knock on by the incident ion and heavy fragment stripping of this ion. It is demonstrated that stripping mechanism allows to reproduce all the experimental characteristic features of the process except the cross-section dependence on α-particle separation energy in the target. Knock on process reproduces this feature as well. It is pointed that the analysis of experimental data on the hard part of α-particle spectrum allows to gain a unique information on the properties of the strongly rotating nuclei produced in these reactions.