Why can neutrons cause nuclear reactions at any energies, and protons and alpha particles – only at their high kinetic energy?

For a nuclear reaction to occur under the action of a positively charged particle, it is necessary that the particle has a kinetic energy sufficient to overcome the action of the forces of Coulomb repulsion. Uncharged particles, for example, neutrons, can penetrate into atomic nuclei, having arbitrarily low kinetic energy.