**Figure A08-m5bi-F1:** Polar differential cross section for chemi-ionization (CM
system) at E=13.1 eV. (b) Differential cross section calculated with the stationary-phase
approximation and uniform rainbow approximation showing separated the
long-wavelength interference structures due to a + c (,
full curve), b + c (, full curve) and d + e (,
dashed curve) interferences. (c) Full bars indicate the
measured maxima of the interference structure on the differential
cross section due to net-attractive scattering. Dashed bars indicate
the maxima due to net-repulsive scattering.