  We study one of the multidimensional inverse scattering problems for quantum
systems governed by the Stark Hamiltonians. By applying the time-dependent
method developed by Enss and Weder in 1995, we prove that the high-velocity
limit of the scattering operator determines uniquely the short-range
interaction potentials. Moreover, we prove that, when a long-range interaction
potential is given, the high-velocity limit of the Dollard-type modified
scattering operator determines uniquely the short-range part of the
interactions. We allow the potential functions to belong to very broad classes.
These results are improvements on the previous results obtained by Adachi and
Maehara in 2007 and Adachi, Fujiwara, and Ishida in 2013.
