Improved information on the H-2(Li-6,alpha)He-4 reaction extracted via the "Trojan horse" method

We have studied the H-2(Li-6,alpha)He-4 two-body reaction by applying the "Trojan horse" method (THM) to the Li-6(Li-6,alpha alpha)He-4 three-body reaction. The astrophysical S(E) factor has been extracted in the energy range between 10-800 keV for the two cases of target and projectile quasifree break-up. We found good agreement between the two data sets leading an improved determination of the S(E) with S(0) = 16.9 +/- 0.5 MeV b, Furthermore, the electron screening potential energy U-e = 320 +/- 50 eV has been extracted in a model-independent way by comparing direct and THM data. This value is significantly higher than the value predicted by current theoretical models.