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Data for the scattering of 6He, 8He, 9Li, and 11Li from hydrogen are analyzed within a fully microscopic folding model of proton-nucleus scattering. Current data suggest that of these only 11Li has a noticeable halo. For 6He, we have also analysed the complementary reaction 6Li(gamma,pi)6He(gs). The available data for that reaction support the hypothesis that 6He 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 6He.Comment: 18 pages, 8 figures (added 4 figures), added reference. Version accepted for publication in Phys. Rev.

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Electron and intermediate energy proton scattering data from 6 Li and 7 Li, both elastic and inelastic, have been analyzed using wave functions obtained from shell model calculations involving spaces ranging from the conventional 0ប space to the (0ϩ2ϩ4)ប one. The results, along with those of the static and dynamic properties of the low-lying spectra of the nuclei, allow for a strict assessment of the wave functions, as well as giving an indication of possible clusterlike behavior in those systems. ͓S0556-2813͑97͒00706-1͔

Inelastic scattering data of 11 Li from hydrogen at 68A MeV have been interpreted as the excitation of a state in 11 Li at E x 1.3 MeV, with an assignment of J p 3 2 1 . Analysis of those data in a distorted wave approximation assuming transitions to three candidates obtained in a ͑0 1 2͒hv shell model suggests an alternative nuclear shakeoff mechanism.[S0031-9007(97)03915-X]