Measurement of the B 10 (p,α0) Be 7 cross section from 5 keV to 1.5 MeV in a single experiment using the Trojan horse method

For the first time the astrophysical factor of the B10(p,α0)Be7 reaction has been measured over a wide energy range, from 5 keV to 1.5 MeV, via the Trojan horse method (THM) applied to the quasifree H2(B10,αBe7)n reaction. Therefore, the S(E) factor has been recast into absolute units by scaling in the energy range 200 keV-1.2 MeV to a recent measurement using the activation method, leading to a normalization uncertainty of 4%. An R-matrix fit of the THM data was performed, to parametrize the S factor, obtain spectroscopic information on the populated resonances, and compare with other recent experiments. Finally, a new determination of the screening potential Ue has been obtained, Ue=240±50 eV, with a much smaller error than our previous measurement.