Proton-proton chain
From Glossary of Meteorology
proton–proton chain
(Or proton–proton cycle.) A chain of fusion reactions the net effect of which is that four protons yield a helium nucleus.
This chain accounts for about 99% of the energy conversion that keeps the sun at its high temperature. We owe our existence to the proton–proton chain, the source of the sun's energy.
