Retrieving "Helium Nucleus" from the archives

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1. Solar Neutrino Flux

   Linked via "helium nucleus"

   This reaction produces low-energy electron neutrinos ($\nu_e$).
   pp-II Branch: Involving the subsequent capture of a helium nucleus ($^3\text{He}$) by a proton ($^1\text{H}$). This branch contributes a small, but distinctly lower-energy, subset of $\nu_e$.
   pp-III Branch (Beryllium and Boron):