  A novel method was developed for the extraction of short emission times of
light particles from the projectile-like fragments in peripheral deep-inelastic
collisions in the Fermi energy domain. We have taken an advantage of the fact
that in the external Coulomb field particles are evaporated asymmetrically. It
was possible to determine the emission times in the interval 50-500 fm/c using
the backward emission anisotropy of alpha-particles relative to the largest
residue, in the reaction 28Si + 112Sn at 50 MeV/nucleon. The extracted times
are consistent with predictions based on the evaporation decay widths
calculated with the statistical evaporation model generalized for the case of
the Coulomb interaction with the target.
