  The phenomenon of wavepacket diffraction in space and time is investigated
numerically and analytically, for a one-dimensional array of equally spaced
finite-depth wells. Theoretical predictions for the lattice at long times and
at low scattering energies, coincide exactly with the results for a single
well. At intermediate and short times compared to the classical passage time,
the pattern shows both a broad diffractive pattern and an interference pattern
inside each diffractive peak. The diffractive structure persists for this case
to infinite time.
