摘要: The differential cross section of elastic $p$-${\mathrm{He}}^{4}$ scattering at 1.7 BeV/c is computed, using a nuclear wave function consistent with $e\ensuremath{\alpha}$ data. A calculation the for ${\ensuremath{\pi}}^{\ensuremath{-}}$-${\mathrm{He}}^{4}$ 8 also presented.