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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Direct observation of Young's double-slit interferences in vibrationally resolved photoionization of diatomic molecules
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Direct observation of Young's double-slit interferences in vibrationally resolved photoionization of diatomic molecules

机译:直接观察杨氏双缝干涉在双原子分子的振动分辨光电离中

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摘要

Vibrationally resolved valence-shell photoionization spectra of H_2, N_2 and CO have been measured in the photon energy range 20-300 eV using third-generation synchrotron radiation. Young's double-slit interferences lead to oscillations in the corresponding vibrational ratios, showing that the molecules behave as two-center electron-wave emitters and that the associated interferences leave their trace in the angle-integrated photoionization cross section. In contrast to previous work, the oscillations are directly observable in the experiment, thereby removing any possible ambiguity related to the introduction of external parameters or fitting functions. A straightforward extension of an original idea proposed by Cohen and Fano [Cohen HD, Fano U (1966) Phys Rev 150:30] confirms this interpretation and shows that it is also valid for diatomic heteronuclear molecules. Results of accurate theoretical calculations are in excellent agreement with the experimental findings.
机译:使用第三代同步加速器辐射,在20-300 eV的光子能量范围内测量了H_2,N_2和CO的振动分辨价壳光电离光谱。杨氏双缝干涉导致相应的振动比发生振荡,表明分子表现为两个中心的电子波发射器,并且相关的干涉在角度积分的光电离截面中留下了痕迹。与以前的工作相反,在实验中可以直接观察到振荡,从而消除了与引入外部参数或拟合函数有关的任何可能的歧义。 Cohen和Fano提出的原始想法的直接扩展[Cohen HD,Fano U(1966)Phys Rev 150:30]证实了这种解释,并表明它对于双原子异核分子也是有效的。准确的理论计算结果与实验结果非常吻合。

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