GIANT PLASMON EXCITATION IN FREE C-60 AND C-70 MOLECULES STUDIED BY PHOTOIONIZATION
GIANT PLASMON EXCITATION IN FREE C-60 AND C-70 MOLECULES STUDIED BY PHOTOIONIZATION
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DOI：
10.1103/physrevlett.68.784
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发表时间：
1992-02-10
影响因子：
8.6
通讯作者：
KAMKE, W
中科院分区：
文献类型：
--
作者：
HERTEL, IV;STEGER, H;KAMKE, W
利用同步辐射研究了C60和C70的单光子电离，电离势范围从C60的7.54 +/- 0.04 eV到C70的7.3 +/- 0.2 eV，最高可达35 eV。光离子产率主要由在约20 eV处的强共振决定，其半高宽约为10 eV。我们解释这是由于自电离通过巨等离子体共振最近预测的RPA近似。C60和C70提供了一个独特的可能性，在自由分子中的集体激发与在固相中观察到的电子能量损失光谱在约28 eV的定量比较。
Single-photon ionization of C60 and C70 has been studied using synchrotron radiation in an energy range from the ionization potential (7.54 +/- 0.04 eV for C60; 7.3 +/- 0.2 eV for C70) up to 35 eV. The photoion yield is dominated by a strong resonance at about 20 eV with a FWHM of approximately 10 eV. We interpret this as being due to autoionization via the giant plasmon resonance recently predicted in the RPA approximation. C60 and C70 Offer the unique possibility for a quantitative comparison of this collective excitation in the free molecule with that observed in the solid phase by electron-energy-loss spectroscopy at about 28 eV.