A deuterium reaction that occurs in an experimental fusion reactor is in two stapes
(1) Two deuterium nucli fuse together to form a tritium nucleus , with a proton as a by-product written as 1>(D,P)T.
(2) A tritium nucleus fuses with another oleunterium nucleus to form a helium 2He4 nucleus with neutron as a-by-product written as T(D,n)2He4.
Then the energy released in each of two stages and energy released in combined reaction is