Alternative evaluations of halos in nuclei

Data for the scattering of [Formula Presented] [Formula Presented] and [Formula Presented] from hydrogen are analyzed within a fully microscopic folding model of proton-nucleus scattering. Current data suggest that of these only [Formula Presented] has a noticeable halo. For [Formula Presented] we have also analyzed the complementary reaction [Formula Presented] The available data for that reaction support the hypothesis that [Formula Presented] may not be a halo nucleus. However, those data are scarce and there is clearly a need for more to elicit the microscopic structure of [Formula Presented].