Hafnium-178-m2 is a nuclear isomer— an atomic state where the particles of the nucleus are “excited” by higher than normal amounts of energy. read more
Any hafnium bombs would probably take decades to create, but at least one other country, Russia, has an active isomer-weapon research program. And unless DARPA and the scientists supporting hafnium isomer research back off their claims, Element 72 will continue to provoke controversy. read more