Explanation ofHe3and triton rates in the alpha breakup inclusive cross sections

($\alpha$, ${}_{}{}^3{}_{}{}^{}\mathrm{He}$) and ($\alpha , t$) continuum inclusive spectra are measured on target nuclei ranging from ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ to ${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}$. Systematic differences in the absolute magnitudes of the ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ and triton spectra are found. To explain these differences the distorted-wave Born approximation calculations in the post form for inclusive breakup reactions are performed. It is shown that Coulomb effects are responsible for these differences.