Abstract
Absolute cross-section measurements are reported for single photoionization of Cn+ 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 Cn+ molecular ions with a beam of monochromatized synchrotron radiation and measuring the yield of Cn2+ 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 C60 and may be attributable to a harmonic of the dominant surface-plasmon resonance near 23 eV.
| Original language | English |
|---|---|
| Article number | 053412 |
| Journal | Physical Review A |
| Volume | 95 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 22 2017 |
Funding
This research was supported by the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U. S. Department of Energy under Grant No. DE-FG02-03ER15424. Additional funding was provided by the Office of Basic Energy Sciences, U. S. Department of Energy under Contract No. DE-AC03-76SF0098 and by the Deutsche Forschungsgemeinschaft under Grants No. Mu 1068/10 and No. Mu 1068/22. We are grateful to the late L. Dunsch for providing a purified The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
| Funder number |
|---|
| DE-AC02-05CH11231, DE-FG02-03ER15424, DE-AC03-76SF0098 |
| 1068/10, 1068/22 |