Stimulated Isomer Energy Release Isomers: The relation of two or more nuclides with the same mass numbers and atomic numbers but different energy states and rates of radioactive decay. Hf 178m2 104 107 109 1011 Energy Release Chemical Nuclear Nuclear (Joules/gm) Transformation Isomer Transformation Relaxation New Source of High Energy Density Materials Miniature bomb Explosive yield : 2KT Size: 5 inch diameter