  We review the current status of obtaining the spectroscopic information on
the one-neutron halo nuclei from the Coulomb breakup reactions. The theory of
these reactions formulated in the framework of the Distorted Wave Born
Approximation, allows the use of the realistic wave functions corresponding to
any orbital angular momentum structure for the core-valence neutron relative
motion in the ground state of the projectile. The energy, angular and parallel
momentum distributions of the projectile fragments calculated within this
theory are selective about the ground state wave function of the projectile.
Therefore, firm conclusions can be drawn about the structure of the projectile
ground state by comparing the calculations with the corresponding data.
