Tritium

Scientists from the Lawrence Livermore National Laboratory report they were able to create a type of fusion reaction by bombarding a microscopic pellet of fuel with beams from 192 powerful lasers to compress its component parts — hydrogen isotopes known as deuterium and tritium — and fuse them together at the atomic level.

Electrochemical polymerization of the 1,2-tritiated monomer produced a polymer in which all of the tritiums were eliminated except for those located at the ends of the chains