Scattering ofHe6fromAu197,Tinat,Al27,Cnat, andBe9atE=8–9 MeV

Abstract
Beams of He6 ions having E=8.8–9.3 MeV and intensity up to 2×104 s1 have been produced via the Be9 (7Li,6He)10B reaction. The beams had an energy resolution of 0.8 MeV full width at half maximum, 1-cm-diam spot size, and ±3° angular divergence. The first elastic-scattering data for He6 from several targets are presented as examples of the use of this radioactive beam in secondary scattering experiments and their potential use for transfer or breakup reactions. Optical model parameters for He6 are deduced by comparison with calculations using Li6,7 and He4 parameters. The data are well reproduced with Li6 or Li7 optical model parameters but not with those from He4.