2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191207We explore approximations to the effective $S$ factor for the $^7Be(p,γ)^8B$ reaction using different approximation for the integral over the Gamov peak. In the temperature range of interest for solar neutrino production, $S_{eff}(E)$ may be determined to within 0.5% from S(20) with no direct information on the derivatives of S(E).Nuclear TheoryAstrophysicstext