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Observation of partial wave resonances in low-energy [O.sub.2]-[H.sub.2] inelastic collisions.(REPORTS)(Report)(Author abstract)

Chefdeville, Simon ; Kalugina, Yulia ; Van De Meerakker, Sebastiaan Y. T. ; Naulin, Christian ; Lique, Francois ; Costes, Michel

Science, Sept 6, 2013, Vol.341(6150), p.1094(3) [Periódico revisado por pares]

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  • Título:
    Observation of partial wave resonances in low-energy [O.sub.2]-[H.sub.2] inelastic collisions.(REPORTS)(Report)(Author abstract)
  • Autor: Chefdeville, Simon ; Kalugina, Yulia ; Van De Meerakker, Sebastiaan Y. T. ; Naulin, Christian ; Lique, Francois ; Costes, Michel
  • Assuntos: Particle Collisions -- Research ; Quantum Mechanics -- Research ; Scattering (Physics) -- Research
  • É parte de: Science, Sept 6, 2013, Vol.341(6150), p.1094(3)
  • Descrição: Partial wave resonances predicted to occur in bimolecular collision processes have proven challenging to observe experimentally. Here, we report crossed-beam experiments and quantum-scattering calculations on inelastic collisions between ground-state [O.sub.2] and [H.sub.2] molecules that provide state-to-state cross sections for rotational excitation of [O.sub.2] (rotational state N = 1, j = 0) to [O.sub.2] (N = 1, j = 1) in the vicinity of the thermodynamic threshold at 3.96 [centimeter.sup.-1]. The close agreement between experimental and theoretical results confirms the classically forbidden character of this collision-induced transition, which occurs exclusively in a purely quantum mechanical regime via shape and Feshbach resonances arising from partial waves with total angular momentum (J) = 2 to 4. 10.1126/science.12431395
  • Idioma: English

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