### 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) |
---|---|

Pages (from-to) | 703-711 |

Number of pages | 9 |

Journal | International Journal of Mass Spectrometry |

Volume | 223-224 |

DOIs | |

State | Published - Jan 15 2003 |

### Fingerprint

### Keywords

- Cluster
- Electron impact
- Fullerenes
- Ionization cross sections

### ASJC Scopus subject areas

- Physical and Theoretical Chemistry
- Spectroscopy

### Cite this

*International Journal of Mass Spectrometry*,

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

**A semi-empirical method for the calculation of cross sections for the electron-impact ionization of negatively charged fullerenes.** / Scheier, Paul; Deutsch, H.; Becker, K.; Märk, T. D.

Research output: Contribution to journal › Article

*International Journal of Mass Spectrometry*, vol. 223-224, pp. 703-711. https://doi.org/10.1016/S1387-3806(02)00943-0

}

TY - JOUR

T1 - A semi-empirical method for the calculation of cross sections for the electron-impact ionization of negatively charged fullerenes

AU - Scheier, Paul

AU - Deutsch, H.

AU - Becker, K.

AU - Märk, T. D.

PY - 2003/1/15

Y1 - 2003/1/15

N2 - 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 C60 and C70 and of the ionized fullerenes C60 q+ (q=1-3) to the calculation of multiple ionization processes of the negatively charged fullerenes Cm - (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 C84 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 σgeom(m)/σgeom(m′) to the power "z".

AB - 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 C60 and C70 and of the ionized fullerenes C60 q+ (q=1-3) to the calculation of multiple ionization processes of the negatively charged fullerenes Cm - (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 C84 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 σgeom(m)/σgeom(m′) to the power "z".

KW - Cluster

KW - Electron impact

KW - Fullerenes

KW - Ionization cross sections

UR - http://www.scopus.com/inward/record.url?scp=0037437636&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037437636&partnerID=8YFLogxK

U2 - 10.1016/S1387-3806(02)00943-0

DO - 10.1016/S1387-3806(02)00943-0

M3 - Article

AN - SCOPUS:0037437636

VL - 223-224

SP - 703

EP - 711

JO - International Journal of Mass Spectrometry

JF - International Journal of Mass Spectrometry

SN - 1387-3806

ER -