Paragraph: Scientists are working hard to develop nuclear fusion reactor. Nuclei of heavy hydrogen, ₁^2 H known as deuteron and denoted by D can be thought of as a candidate for fusion reactor. The D - D reaction is ₁^2 H + ₁^2 H ₂^3 He +n+ energy. In the core of fusion reactor. A gas of heavy hydrogen is fully ionized into deuteron nuclei and electrons. This collection of ₁^4 H nuclei and electrons is known as plasm