Cross sections for photoionization of fullerene molecular ions C-n(+) with n=40, 50, 70, 76, 78, and 84
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Authors
Thomas, C. M.
Baral, Kiran K.
Aryal, Nagendra B.
Habibi, Mustapha
Esteves-Macaluso, David A.
Kilcoyne, A. L. D.
Aguilar, A.
Schlachter, A. S.
Schippers, S.
Mueller, A.
Issue Date
2017
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Article
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Abstract
Absolute cross-section measurements are reported for single photoionization of C-n(+) fullerene molecular ions (n = 40, 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 of C-n(+) molecular ions with a beam of monochromatized synchrotron radiation and measuring the yield of C-n(2+) product 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 n. 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 of C-60 and may be attributable to a harmonic of the dominant surface-plasmon resonance near 23 eV.
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Thomas, C. M., Baral, K. K., Aryal, N. B., Habibi, M., Esteves-Macaluso, D. A., Kilcoyne, A. L. D., … Phaneuf, R. A. (2017). Cross sections for photoionization of fullerene molecular ions Cn+ with n = 40, 50, 70, 76, 78, and 84. Physical Review A, 95(5). doi:10.1103/physreva.95.053412
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2469-9926