 Nevertheless, because of reasons not very well understood yet, there is a slight increased nuclear stability around atomic numbers 110–114, which leads to the appearance of what is known in nuclear physics as the "island of stability".This concept, proposed by University of California professor Glenn Seaborg, explains why superheavy elements last longer than predicted.Calculations according to the Hartree–Fock–Bogoliubov method using the non-relativistic Skyrme interaction have proposed "Z" = 126 as a closed proton shell.