# #Mon Aug 09 11:52:47 CEST 2010 Slide__w6tcUKObEd-WfYQ0GneCwQ_footer=Source\: Max Planck Institute for Plasma Physics (IPP), Garching Slide__w6tcUKObEd-WfYQ0GneCwQ_subTitle=As with nuclear fission, the fusion energy results from a tiny mass difference between initial and final products, the "mass defect".

The amount of binding energy released this way corresponds to Einstein's energy equivalent of mass.

The binding energy of atomic nucleons shows a minimum for iron; therefore energy gain is possible for heavy nuclei by fission, but for light ones by fusion.

Slide__w6tcUKObEd-WfYQ0GneCwQ_title="Mass defect"