  The differential and total cross sections for the scattering of muonic,
pionic, kaonic and antiprotonic hydrogen in excited states from atomic hydrogen
have been calculated for the purpose of atomic cascade calculations. The
scattering problem is treated in a fully quantum mechanical framework which
takes the energy shifts and, in the case of the hadronic atoms, the widths of
the ns states into account. The validity of semiclassical approximations is
critically examined.
