Elastic cross sections and a complete set of analyzing powers (${\mathit{iT}}_{11}$, ${\mathit{T}}_{20}$, ${\mathit{T}}_{21}$, and ${\mathit{T}}_{22}$) were measured for the first time for the ${}_{}{}^4{}_{}{}^{}\mathrm{He}$${(}^6$Li→, ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$)α system at ${\mathit{E}}_{\mathrm{c}.\mathrm{m}.\mathrm{}}$=11.1 MeV. Elastic cross-section data for the same reaction at 15 MeV are also reported. The angular range covered is from 10° to 160° c.m., and all analyzing powers reported have large magnitudes except for ${\mathit{T}}_{21}$. Additionally, an analyzing power excitation function is reported for the same reaction between ${\mathit{E}}_{\mathrm{c}.\mathrm{m}.\mathrm{}}$=10.3 and 11.9 MeV. Results of both optical model and optical model plus α exchange processes including transfers from the 2S and 1D components of the ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ ground state wave function are presented. The analysis shows the presence of an explicit spin orbit potential, a very small and negative spectroscopic amplitude of the 1D component (${\mathit{b}}_{\mathit{D}}$), and an angular momentum-dependent absorption. © 1996 The American Physical Society.

• Received 30 January 1996

DOI:https://doi.org/10.1103/PhysRevC.53.2862