All elements below nickel and iron on the Periodic Table can undergo fusion, under the proper conditions.
However due to limits on the conditions achievable within the casing of a bomb, only deuterium and tritium will work. However standard hydrogen bomb designs use the compound lithium deuteride instead (tritium is radioactive and using deuterium and tritium directly requires cryogenics severely complicating the device). Neutrons from fission cause the lithium to split, producing the tritium needed only moments before it is needed to make the bomb work.
In deuterium-tritium fusion, the result is helium-4. In helium fusion, carbon is produced.
The simplest and easiest reaction to do is deuterium tritium fusion, this makes helium-4 and a free neutron.The next simplest is deuterium deuterium fusion, this can make any of 3 products: helium-4, helium-3 and a free neutron, or tritium and hydrogen.The hardest is multistep, hydrogen hydrogen fusion, this makes helium-2 which instantly beta decays to deuterium, followed by deuterium deuterium or deuterium tritium fusion.There are various other pathways too.
All current nuclear reactors are fission reactors, tritium has no function in a fission reactor, in standard water moderated reactors deuterium also has no function, in heavy water moderated reactors deuterium is the moderator. If we are ever able to make a fusion reactor, deuterium/tritium mix will be used as fuel.
deuterium and tritium fuse producing helium and a neutronthe helium is fully ionized and thus could also be called an alpha particle
DT fusion has the lowest temperature/pressure of ignition of all fusion processes, and so is the easiest to start.
deuterium, and tritium
Deutrium and tritium are needed as fuel in fusion reactor.
Deuterium plus tritium
In deuterium-tritium fusion, the result is helium-4. In helium fusion, carbon is produced.
At the instant of detonation, the temperature at the core of the fusion reaction is high enough for the fusion of deuterium with tritium, and of tritium with tritium (50,000,000°C and 400,000,000°C, respectively.
Experiments in fusion have used deuterium and tritium, both isotopes of hydrogen
Mainly; hydrogen, deuterium, and tritium
The simplest and easiest reaction to do is deuterium tritium fusion, this makes helium-4 and a free neutron.The next simplest is deuterium deuterium fusion, this can make any of 3 products: helium-4, helium-3 and a free neutron, or tritium and hydrogen.The hardest is multistep, hydrogen hydrogen fusion, this makes helium-2 which instantly beta decays to deuterium, followed by deuterium deuterium or deuterium tritium fusion.There are various other pathways too.
For man made fusion the most likely ones are a mixture of deuterium and tritium
Deuterium and Tritium
The most likely fuel for fusion on earth is a mixture of deuterium and tritium (both isotopes of hydrogen)
All current nuclear reactors are fission reactors, tritium has no function in a fission reactor, in standard water moderated reactors deuterium also has no function, in heavy water moderated reactors deuterium is the moderator. If we are ever able to make a fusion reactor, deuterium/tritium mix will be used as fuel.