Absolute differential and total (integrated) cross sections for the ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$($p$,${}_{}{}^3{}_{}{}^{}\mathrm{He}$)${}_{}{}^4{}_{}{}^{}\mathrm{He}$ reaction at proton energies between ∼0.14 and 3 MeV are presented, and compared with previous measurements. The results comprise a consistent set of data over much of the energy range of interest to a number of applications. Thermonuclear reaction rate parameters and astrophysical $S$ factors are calculated. The measured angular distributions are compared to predictions of a preliminary $R$-matrix analysis based on the nuclear properties of energy levels in the mass-7 system.

NUCLEAR REACTIONS ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$($p$,${}_{}{}^3{}_{}{}^{}\mathrm{He}$)${}_{}{}^4{}_{}{}^{}\mathrm{He}$, $E_p=0.14-3\mathrm{}$ MeV; enriched target; measured $\sigma (E_p,\theta )$, $\sigma \left(E_p\right)$; calculated $〈\sigma v〉$, astrophysical $S$ factor.

• Received 27 August 1979

DOI:https://doi.org/10.1103/PhysRevC.20.1984