FUSION REACTION

When two light nuclei combine together to form a single nucleus, resulting in the release of energy.
This process is fusion.
The energy produced in fusion is far greater that the energy released from a fission reaction of the same mass.

The fusion of nuclei of hydrogen-2 and hydrogen-3 forms a nucleus of helium-4 and a neutron.

2 1

H +

3 1

H

-->

4 2

He +

1 0

n +

energy

For fusion to occur, nuclei have to collide at very high speeds to overcome the replusion forces.
The temperature of hydrogen gas needs to be 100 million K for fusion to take place.