Because c is very large, a small amount of missing mass turns into a large amount of energy. The main fuels used in nuclear fusion devises are deuterium and tritium, both heavy isotopes of hydrogen.

Deuterium, which can be distilled from all forms ... has achieved worldwide visibility through its recent successes in direct ...

THE exceptionally small natural line-widths obtainable with the magnetic resonance absorption method 1,2 or nuclear induction method 3,4 makes these methods suitable for precision measurements of ...