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physical phenomena > energy source > exothermic fusion process > hydrogen burning > proton-proton chain > PP II
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PP II comparison table
Subject has reaction is a kind of is an instance of has definition
proton-proton chain pycnonuclear reaction An important nuclear fusion reaction that occurs in stars. It begins with the fusion of two hydrogen nuclei, each of which consists of a single proton.
PP II1H(p, β+v)2D(p, γ)3He(4He, γ)7Be(β+v)7Li(p,α)4He proton-proton chainA thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei. Although the neutrinos from this reaction are detectable, they have not been observed.

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