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- W2046119548 abstract "A collaborative experimental and theoretical study of rotationally inelastic collisions of resolved CH(A 2Δ,v=0) Λ-doublet levels of high rotational angular momentum N with argon is presented. Experimental state-to-state rate constants were extracted from CH A 2Δ→X 2Π resolved fluorescence spectra upon laser excitation to individual levels in the A 2Δ state in the presence of Ar. Fluorescence detection of the collision-induced final-state populations permits resolution of the Λ-doublet levels at high N, but without fine-structure discrimination. The largest rate constants were for ΔN=0 A′↔A″ symmetry-changing transitions. For exothermic ΔN<0 transitions, the rate constants decreased monotonically with increasing magnitude of ΔN, and a slight preference for conservation of the Λ-doublet symmetry was found. These rate constants have been compared and interpreted with theoretical rate constants computed through quantum coupled-states calculations of cross sections based on ab initio CH(A 2Δ)–Ar potential-energy surfaces determined by G. Kerenskaya, A. Kaledin, and M. C. Heaven (to be published). The electronic symmetry of the rotational, fine-structure/Λ-doublet levels of a Δ2 electronic state has also been analyzed." @default.
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- W2046119548 date "2001-07-08" @default.
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- W2046119548 title "Experimental and theoretical study of Λ-doublet resolved rotationally inelastic collisions of highly rotationally excited CH(A 2Δ,v=0) with Ar" @default.
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- W2046119548 doi "https://doi.org/10.1063/1.1377599" @default.
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