### Abstract

We extended our previously developed semi-empirical method for the calculation of cross section functions (absolute value and energy dependence) for the electron-impact ionization of the neutral fullerenes C_{60} and C_{70} and of the ionized fullerenes C_{60}^{q+} (q=1-3) to the calculation of multiple ionization processes of the negatively charged fullerenes C_{m}^{-} (m=60, 70, and 84). Systematic trends and tendencies are highlighted and a detailed comparison with available experimental data is made. Predictions are also made for cross sections for the ionization of the neutral fullerene C_{84} up to charge state z=6. An attempt is made to elucidate the origin of an experimentally observed scaling law that relates the ratio of the measured ionization cross sections of different fullerenes m and m′, σ_{-1,z}(m)/σ_{-1,z}(m′), where the subscript "-1" refers to the fact that the initial target is negatively charged and "z" denotes the charge state of the final ion, to the corresponding ratio of the geometric cross sections σ_{geom}(m)/σ_{geom}(m′) to the power "z".

Original language | English (US) |
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Pages (from-to) | 703-711 |

Number of pages | 9 |

Journal | International Journal of Mass Spectrometry |

Volume | 223-224 |

DOIs | |

State | Published - Jan 15 2003 |

### Keywords

- Cluster
- Electron impact
- Fullerenes
- Ionization cross sections

### ASJC Scopus subject areas

- Instrumentation
- Condensed Matter Physics
- Spectroscopy
- Physical and Theoretical Chemistry

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## Cite this

*International Journal of Mass Spectrometry*,

*223-224*, 703-711. https://doi.org/10.1016/S1387-3806(02)00943-0