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首页> 外文期刊>The Journal of Chemical Physics >Velocity-map imaging study of the O(P-3)+N-2 product channel following 193 nm photolysis of N2O
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Velocity-map imaging study of the O(P-3)+N-2 product channel following 193 nm photolysis of N2O

机译：193 nm N2O光解后O（P-3）+ N-2产物通道的速度图成像研究

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Velocity-map imaging has been used to characterize the velocity and angular momentum alignment distributions of the O(P-3(J)) products of N2O photolysis at 193 nm. The measured velocity and spatial anisotropy distributions indicate that around 60% of the available energy appears in product translation, with the remainder being released into internal excitation of the N-2 cofragment. The measured O(P-3(J)) alignment parameters have been interpreted in terms of an instantaneous dissociation model, which suggests preferential population of M-L=0 states and an electron density distribution peaking perpendicular to the direction of the breaking bond. This is consistent with dissociation on a surface of Sigma(-) symmetry, the most likely candidate correlating with ground state products being the asymptotic (3)Sigma(-)((3)A") surface. There are several possible routes to this surface, and these are considered in light of the measured velocity distributions and velocity-dependent spatial anisotropy parameters of the O(P-3) products relative to the dominant O(D-1) dissociation channel. (C) 2003 American Institute of Physics. [References: 30]
机译：速度图成像已被用来表征N2O光解的O（P-3（J））产物在193 nm处的速度和角动量对准分布。测得的速度和空间各向异性分布表明，大约60％的可用能量出现在产物平移中，其余的释放到N-2共碎片的内部激发中。测得的O（P-3（J））对准参数已根据瞬时解离模型进行了解释，该模型表明优先选择的M-L = 0状态和垂直于断裂键方向的电子密度分布达到峰值。这与Sigma（-）对称表面上的解离相一致，与基态乘积相关的最可能候选对象是渐近（3）Sigma（-）（（3）A“）表面。有多种可能的途径表面，并且根据测得的速度分布和相对于主要O（D-1）解离通道的O（P-3）产物的速度相关的空间各向异性参数来考虑这些问题（C）2003年，美国物理研究所[参考：30]

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