Expected Solar Neutrino Sources, Energies, and Fluxes

2 Expected Solar Neutrino Sources, Energies, and Fluxes 

The sun is a major source of neutrinos reaching the surface of Earth due to its close proximity. The sun emits 1.8 x 1038 neutrinos/second, which, after an 8-min transport time, reach the surface of Earth at a rate of 6.4 x 1010 neutrinos/s/cm2. The predictions of the standard solar model for the neutrino fluxes at the surface of Earth due to various nuclear reactions are shown in Table 12.3. 

TABLE 12.3 Predicted Solar Neutrino Fluxes (Bahcall and Pena-Garay) 

This latter reaction produces the highest energy neutrinos with a maximum energy of 18.77 MeV due to the high reaction Q value. The intensity of this source is about 

107 less than the pp source. The 7Be source refers to the pp chain electron capture decay reaction 

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