The complex Interpretation in general is specified in this module as the quantitative interpretation; the qualitative interpretation is given in A08-m5a. In its turn, this module is an aggregate of two components: in A08-m5bi the potential and deflection function are determined, using both theory and experiment, so that in A08-m5bii the differential cross section of the chemi-ionisation reaction can be calculated. The latter component consists in its turn of two constituents in which two specific types of coupling are taken into account.