  The dynamics of an anapole seen as dark matter at low energies is studied by
solving the Schr\"odinger-Pauli equation in a potential involving Dirac-delta
and its derivatives in three-dimensions. This is an interesting mathematical
problem that, as far as we know, has not been previously discussed. We show how
bound states emerge in this approach and the scattering problem is formulated
(and solved) directly. The total cross section is in full agreement with
independent calculations in the standard model.
