Abstract
The problem of the magnitude of the S-factor of the hep process p+ 3 He→ 4 He+ e ++ ν e is one of the most important unsolved problems in nuclear astrophysics. The magnitude of S(hep) has also an important impact on the interpretation of the Super-Kamiokande and future SNO solar neutrino results in terms of neutrino oscillations. We point out the possibility to determine the major hadronic contribution to S(hep) from the measurement of the total cross-section of the process n+ 3 H→ 4 He+ e −+ ν ̄ e in experiments with high intensity beams of thermal or cold neutrons.
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