Abstract

We have measured the energy and angle differential ejected electron spectra of C₆₀ as well as Ne atoms in collisions with 4 MeV/u bare fluorine projectile ions. Absolute cross sections have been estimated for electron emission in the energy range of 1 eV–300 eV, including the KLL-Auger electrons for various angles between 30° and 150°. The double differential cross sections for C₆₀ have been compared with the state-of-the-art CDW-EIS model under CNDO approximation as well as with the data for the Ne target. The C₆₀ spectra at all angles show a broad giant plasmon resonance in the low energy region, which is not present in the atomic target data. The angular distribution reveals the dipolar nature of the plasmon excitation. The C K-LL Auger emission from C₆₀ reveals a large angular anisotropy compared to that for a hydrocarbon, e.g. methane target.

Graphical abstract

中文翻译：

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C 60和Ne快速重离子碰撞电离中的电子发射：巨大等离子体激元激发

摘要

我们测量了与4 MeV / u裸氟弹丸离子碰撞时C ₆₀以及Ne原子的能量和角度差分喷射电子光谱。估计电子发射在1 eV–300 eV能量范围内的绝对截面，包括30°和150°之间各种角度的KLL-Auger电子。已将C ₆₀的双微分横截面与CNDO近似下的最新CDW-EIS模型以及Ne目标的数据进行了比较。在所有角度的C ₆₀光谱均显示出在低能量区域中的宽巨等离激元共振，这在原子靶数据中不存在。角度分布揭示了等离子体激元激发的偶极性质。来自C的C K-LL Auger发射_图60显示了与碳氢化合物例如甲烷靶相比大的角各向异性。

图形概要