Boron depletion: indirect measurement of the ¹⁰B(p,α)⁷Be S(E)-factor

The ¹⁰B(p,α)⁷Be reaction is the main responsible for ¹⁰B destruction in stellar interior. In such environments this p-capture process occurs at a Gamow energy of ∼10 keV, and takes places mainly through a resonant state $({\mathrm{E}}_x=8.701\text{ MeV})$ of the compound ¹¹C nucleus. Thus, a resonance right in the region of the Gamow peak is expected to significantly influence the behaviour of the astrophysical S(E)-factor. The ¹⁰B(p,α)⁷Be reaction has been investigated by means of the Trojan Horse Method (THM) applied to the ²H(¹⁰B,α⁷Be)n three-body process. The experiment was performed at ${\mathrm{E}}_{beam}=27\text{ MeV}$ at the Instituto de Fisica Nuclear de São Paulo. Preliminary results concerning the extraction of the bare-nucleus S(E)-factor will be presented.