  The angular dependence of the columnar recombination in xenon gas, if
observed for low energy nuclear tracks, can be used for a direction-sensitive
dark matter search. We measured both scintillation and ionization to study
columnar recombination for 5.4 MeV alpha particles in a high pressure gas
detector filled with 8 atm xenon. Since the recombination photons are emitted
several~$\mu$s after de-excitation emission, scintillation photons are
separated to the fast and slow components. The fast component does not show
dependence on the track angle relative to the drift electric field, on the
other hand, the slow component increases when the track is aligned with the
electric field. The result indicates that the track angle relative to the
electric field can be reconstructed from the scintillation time profile.
