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The conditions of local Lorentz invariance (LLI) breakdown, obtained during neutron emission from a sonicated cylindrical bar of AISI 304 steel, were reproduced in a system made of a mole of mercury. After 3 min, a part of the liquid transformed into solid state material, in which isotopes were found with both higher and lower atomic mass with respect to the starting material. Changes in the atomic weight without production of gamma radiation and radionuclides are made possible by deformed space-time reactions. © 2015 World Scientific Publishing Company.

Deformed Space-Time (DST) transformations are the consequence of the DST reactions induced in matter by the variation in energy density, in conditions of broken Local Lorentz Invariance (LLI). Through the DST transformations, it is possible to change the atomic weight of matter without using ionizing radiations and avoiding radionuclide production. In this sense, we can call this change of atomic weight “nuclear metabarysis”. These phenomena of nuclear metabarysis are associated with neutron emission. We discuss an experiment of sonication of a steel bar (carried out in Rome in 2012), and analyze the energy distribution of the emitted neutrons. The main signatures of the neutron emission are its asymmetry and anisotropy. We compare these features of neutron emission with those of the Lorentz invariance breakdown, obtained by means of electromagnetic experiments some years ago. © 2015, Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg.