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Quantitative interpretation = A08-m5b

For a quantitative explanation of the measured differential cross sections for the chemi-ionization process in collisions between Na and I [experimental results given in Treated results (link type: 'DEPENDS ON'; to: A08-m4bi)], we calculate the theoretical cross sections using a semi-classical atom-atom model for ion-pair formation in molecular collisions [model given in Theoretical methods (link type: 'DEPENDS ON'; to: A08-m3c)].

In order to calculate the differential cross section [differential cross section determined in Quantitative interpretation (link type: 'CONTAINS/seggregated in/'; to: A08-m5bii)], the deflection function of the collision process has to be determined as a first step, which in its turn depends on the potential of the system. The potential parameters and the deflection function are determined by fitting the theoretical cross sections on the experimental ones in the Quantitative interpretation A08-m5bi [potential and deflection function determined in Quantitative interpretation (link type: 'CONTAINS/seggregated in/is detailed in/focused in'; to: A08-m5bi)].

In the first specific calculation of the differential cross section, we only take into account the Landau-Zener coupling between the potential curves of the system when we determine the theoretical differential cross section. Comparison between the experimental and the theoretical curves shows some persisting discrepancies [interpretation of cross sections with LZ given in Quantitative interpretation (link type: 'CONTAINS/seggregated in /specialised in/is detailed in/focused in'; to: A08-m5bii1)]. Therefore we take into account rotational coupling as well, which explains the discrepancies.interpretation of cross sections with LZ and rotation given in Quantitative interpretation (link type: 'CONTAINS/seggregated in/specialised in/is detailed in/focused in'; to: A08-m5bii2)]