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physical phenomena > energy source > exothermic fusion process > hydrogen burning > proton-proton chain > pep reaction
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pep reaction comparison table
Subject has reaction probability 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.
pep reactiononce in 400 p-p reactions proton-proton chainA reaction occurring in the proton-proton chain which occurs only once in 400 p-p reactions but produces far more energetic neutrinos (1.44 MeV as against 0.42 MeV).

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