Probing the nonlocal approximation to resonant collisions of electrons with diatomic molecules

摘要: A numerically solvable two-dimensional model introduced bythe authors [Phys. Rev. 73, 032721 (2006)]is used to investigate thevalidity of the nonlocal approximation dynamics resonantcollisions electrons with diatomic molecules. The nonlocalapproximation this is derived in detail, all underlyingassumptions are specified and explicit expressions for resonant andnon-resonant (background) T matrix studied processes given.Different choices so-called discrete state, which fully determinesthe approximation, discussedand it shown that a physicalchoice state can general give poorer results than otherchoices minimize non-adiabatic effects and/or backgroundterms matrix. background contributions crosssections, usually not considered theory ofelectron-molecule collisions, be significant only elasticscattering but also inelastic process vibrationalexcitation.