Information on the Li-7(p,alpha)He-4 reaction cross section at energies relevant for astrophysics has been obtained by means of the indirect Trojan-horse method applied to the three-body H-2(Li-7, alpha alpha)n reaction. Measurements at Li-7-beam energies of 19, 19.5, 20, and 21 MeV have been carried out. The results are reported in terms of the astrophysical S(E) factor. The value S(0) measured in the present experiment is compared with that extrapolated from a direct measurement. [S0556-2813(99)01510-1].
- NUCLEAR ASTROPHYSICS