Ionisation in thermal-energy collisions of a resonance-state atom with a ground-state atom. The role of quasimolecular term structure peculiarities

Interactions of noble gas atoms. Processes due to elastic scattering

“…This method was formulated for analysis of atomic interaction with LScoupling of angular momenta and takes into account various types of interatomic interactions (dispersion, Coulomb and exchange). The formulation of effective Hamiltonian method for the X * -Y atomic interaction analysis for noble gases, taking into account intermediate angular momenta coupling types in the X* excited atom and with an additional inclusion of nonspherical X+ -Y ion atom interaction is presented in [26][27][28].…”

“…These conditions could be taken into account by the introduction of additional numbers in the effective Hamiltonian. The essentials of the effective Hamiltonian method in general are presented below [15,16], and for the noble gas atom interactions in [24][25][26][27][28]. The latter presentation is also useful for the analysis of other M* + Y atom interactions, particularly in the case when it is not possible to take into account only the levels of a single multiplet.…”

“…1.1.1 Quasimolecular functions of different coupling type. -For quasimolecular term analysis in different R regions the sets of wave functions of different coupling type are required [26].…”

“…The effective Hamiltonian is used as the initial point of intermediate coupling type analysis in quasimolecule X(nopsnl) + Y(1S0) [26]. It is assumed that, in the X(nop 5nl) atom a coupling type close to the jK type takes place.…”

“…Finally, in region III the term interaction of the different atom configurations become important and additional quantum numbers are meaningless [15,16]. Note that, interaction of the different configuration terms with equal j, w, À, K, Ç2 could also be essential in some areas of region II [24,26]. In this case, from 611 sets the numbers n and 1 must be excluded.…”