Engineering Physics Annotation << Back Experimental confirmation of the existence of the neutron-like exoatom «neutroneum» Ratis Yu.L. We demonstrate that exoatom «neutroneum»is the low-laying extremely narrow resonance in the elastic electron-proton scattering. This resonance is caused by the weak interaction and corresponds to the transition of the initial state of the system «electron + proton» into the virtual neutron-neutrino pair. Due to its small width and amplitude, this resonance cannot be registered in the direct experiment on ер-scattering. The third particle at the collision of the electron and the atom of hydrogen results in a three-body effect in the expression for the cross-section of the neutroneum creation – the two-particle propagator of the electron and proton (i.e., excited hydrogen) is under the integral. Therefore the width of the resonance in the cross-section of the creation of the neutroneum at colliding of the electron and the hydrogen is by fourteen orders more than the width of the similar resonance in elastic ер-scattering, and its properties can be investigated experimentally. The estimation of the size, lifetime, threshold and cross-section of the neutroneum creation are carried out. It is shown that the energy of the neutroneum creation threshold is considerably smaller than the threshold energy of the thermonuclear reactions. It means, that neutron-like nuclear-active particles can be create at ultralow energies, and, hence, to be a cause of the nuclear reactions similar to reactions, caused by neutrons, in all cases, when nuclear reactions with the charged particles are forbidden by a high Coulomb barrier. These statements are confirmed by direct experiment. Key words: neutron, exotic, electroweak, reaction. Contacts: E-mail: ratis@rambler.ru Pp. 08-17.