Negative Mass and Negative Refractive Index in Atom Nuclei - Nuclear Wave Equation - Gravitational and Inertial Control: Part 1

Some efforts have been made to prove negative mass behavior through some experiments performed in mechanics, and other disciplines as well as some theories in electrostatics, but I haven't found research about similar effects at the atomic level, where the most elementary mass given by the atomic nucleus is to be found.Is the second Newton's law still valid with negative mass?What could happen if ...