Helium-3
Helium-3 (3He) is a light, stable isotope of helium. It has two protons and one neutron. Helium-3 was discovered in 1939.
Helium-3 occurs as a primordial nuclide. It escapes from the Earth's crust into the atmosphere. It then escape into outer space over millions of years. Helium-3 is also thought to be a natural nucleogenic and cosmogenic nuclide. The amount of helium-3 is thought to be greater on the Moon than on Earth.[1]
Helium-3 Media
Phase diagram for Helium-3. Bcc - body-centered cubic crystal lattice.
The fusion reaction rate increases rapidly with temperature until it maximizes and then gradually drops off. The DT rate peaks at a lower temperature (about 70 keV, or 800 million kelvins) and at a higher value than other reactions commonly considered for fusion energy.
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