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 ($\tau=0\to65$, full curve), b + c ($\tau=65\to250$, full curve) and d + e ($\tau=0\to 2300$, 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.