Rotational energy transfer in vibrationally excited acetylene X̃ 1Σg(ν2‘=1,J‘):ΔJ propensities

作者: R. Dopheide , W. Cronrath , H. Zacharias

DOI: 10.1063/1.467295

关键词:

摘要: A complete set of state‐to‐state rotational energy transfer rate constants has been measured for acetylene–acetylene collisions at room temperature under single collision conditions. Initial states (Ji=5,7,...,25) were prepared and final (Jf=1,...,25) interrogated. The measurements carried out in a typical gas phase pump probe arrangement. initial vibrationally excited state was by stimulated Raman pumping using strong Q‐branch transitions. State preparation via this branch produces an isotropic spatial distribution the which is important data analysis. Narrow bandwidth lasers ensure selectivity. after monitored time‐delayed laser‐induced fluorescence A 1Au(ν3’ = 1)←X 1Σg(ν2‘ 1) transition. In general, decrease exponentially with transferred energy. constant matrix can consistently be described simple paramete...

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