Coulomb dissociation of halo nuclei

Coulomb dissociation of halo nuclei has been investigated as a spectroscopic tool. Substantially large B(E1) strength at low excitation energies appeared in the Coulomb dissociation of halo nuclei is shown to be sensitive exclusively to the halo wave function, thereby enabling us to extract the spectroscopic factor for the halo configuration. We first review the classical case on 11Be and show the results on the application to the neutron-rich 19C nucleus. We have recently made a further investigation on the Coulomb dissociation, such as higher order effects and nuclear breakup contaminants, by using the impact parameter analysis of the reaction on the new data set of 11Be with higher statistics. It shows that such effects are small, and that the use of data with large impact parameter enables us to obtain more precise spectroscopic information. (author)