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Theoretical methods=A08-m3ci

The atom-atom model for ion-pair formation [Particulars on the model in a mesoscopic module (link type: 'is detailed in/wider range/project'; target: MESO-m3c-mod)] explains chemi-ionization in collisions via crossing of the diabatic potential energy surfaces of the system, or in other words, via a transition between two states of the system. A transition between two states can take place when the states are coupled.

The atom-atom model for ion-pair formation takes into account the Landau-Zener transition probability between electronically coupled states [Focus on LZ transition (link type: 'contains/specialised in/is detailed in/focused in'; target: A08-m3ci1]. The model can be further refined by also taking into account rotational coupling [Focus on rotational coupling (link type: 'contains/specialised in/is detailed in/focused in'; target: A08-m3ci2].