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Photoionization Efficiencies of Five Polycyclic Aromatic Hydrocarbons

机译:五个多环芳烃的光离子效率

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摘要

We have measured photoionization-efficiency curves for pyrene, fluoranthene, chrysene, perylene, and coronene in the photon energy range of 7.5-10.2 eV and derived their photoionization cross-section curves in this energy range. All measurements were performed using tunable vacuum ultraviolet (VUV) radiation generated at the Advanced Light Source synchrotron at Lawrence Berkeley National Laboratory. The VUV radiation was used for photoionization, and detection was performed using a time-of-flight mass spectrometer. We measured the photoionization efficiency of 2,5-dimethylfuran simultaneously with those of pyrene, fluoranthene, chrysene, perylene, and coronene to obtain references of the photon flux during each measurement from the known photoionization cross-section curve of 2,5-dimethylfuran.
机译:我们在光子能量范围为7.5-10.2eV的光子能量范围内测定了芘,氟,蛹,腓肠,冠烯的光离子化效率曲线,并在该能量范围内衍生它们的光离子横截面曲线。 所有测量均采用在劳伦斯伯克利国家实验室的先进光源同步rotron上产生的可调谐真空紫外(VUV)辐射进行。 使用飞行时间质谱仪进行VUV辐射进行光相消除,并进行检测。 我们测量了与芘,氟,蛹,丙烯的同时的2,5-二甲基呋喃的光离子化效率,以在每次测量中获得光子通量的参考,从已知的2,5-二甲基呋喃的已知光离子横截面曲线。

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