proton-electron-proton reaction

proton-electron-proton reaction

[′prō‚tän i′lek‚trän ′prō‚tän rē‚ak·shən] (nuclear physics) A nuclear reaction in which two protons and an electron react to form a deuteron and a neutrino; it is an important source of detectable neutrinos from the sun. Abbreviated PeP reaction.