Cross sections for photoionization of fullerene molecular ions Cn+ with n = 40, 50, 70, 76, 78, and 84
Cross sections for photoionization of fullerene molecular ions Cn+ with n = 40, 50, 70, 76, 78, and 84
复制标题
n = 40、50、70、76、78 和 84 的富勒烯分子离子 Cn 光电离的横截面
DOI：
10.1103/physreva.95.053412
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发表时间：
2017
影响因子：
2.9
通讯作者：
R. A. Phaneuf
中科院分区：
文献类型：
--
作者：
C. M. Thomas;K. K. Baral;N. B. Aryal;M. Habibi;D. A. Esteves-Macaluso;A. L. D. Kilcoyne;A. Aguilar;A. S. Schlachter;S. Schippers;A. Müller;R. A. Phaneuf
报告了在 18-70 eV 光子能量范围内富勒烯分子离子（50、70、76、78 和 84）的单光电离的绝对横截面测量。通过将质量和电荷选择的分子离子束与单色同步加速器辐射束合并并测量产物离子的产量作为光子能量的函数来进行实验。通过在该能量范围内积分测量的横截面来确定振荡器强度，表现出线性依赖性。横截面通过拟合三个洛伦兹函数来参数化，以表示等离子体激元激发和用于直接电离的线性函数。 46 eV 附近数据中的最高能量共振与先前在单光电离中观察到的最高能量共振相似，并且可能归因于 23 eV 附近主要表面等离子体共振的谐波。
Absolute cross-section measurements are reported for single photoionization offullerene molecular ions (, 50, 70, 76, 78, and 84) in the photon-energy range 18–70 eV. The experiments were performed by merging a mass and charge selected beam ofmolecular ions with a beam of monochromatized synchrotron radiation and measuring the yield ofproduct ions as a function of the photon energy. Oscillator strengths determined by integrating the measured cross sections over this energy range exhibit a linear dependence on. The cross sections are parametrized by fits to three Lorentzian functions to represent plasmon excitations and a linear function for direct ionization. The highest-energy resonance in the data near 46 eV is similar to that previously observed in single photoionization ofand may be attributable to a harmonic of the dominant surface-plasmon resonance near 23 eV.