Fragmentation of halo nuclei

A short review on high-energy fragmentation reactions with halo nuclei is g iven. Deviations from the general dependence of the matter and the charge r adii on the atomic mass are interpreted as an evidence for a halo structure . Furthermore, kinematically complete experiments yield structural informat ion on halo nuclei. However, in some cases, the interplay of nuclear struct ure and the reaction mechanism makes the analysis ambiguous. This is demons trated by the example of "hump" structures in invariant mass spectra. Final ly the momentum distributions can be used to determine general halo propert ies, while interference effects in angular correlations allow to gain more detailed information.