81U05  $2$body potential scattering theory [See also 34E20 for WKB methods]


81U10  $n$body potential scattering theory


81U15  Exactly and quasisolvable systems


81U20  $S$matrix theory, etc.


81U30  Dispersion theory, dispersion relations


81U40  Inverse scattering problems


81U99  None of the above, but in this section

