Investigation of fullerenes in crossed-beam experiments

D. Hathiramani; Harald Brauning; Andreas Diehl; A. A. Narits; L. P. Presnyakov; P. Scheier; Alexander Theiss; Roland H. Trassl; Erhard Salzborn

doi:10.1117/12.537114

12 December 2003 Investigation of fullerenes in crossed-beam experiments

D. Hathiramani, Harald Brauning, Andreas Diehl, A. A. Narits, L. P. Presnyakov, P. Scheier, Alexander Theiss, Roland H. Trassl, Erhard Salzborn

Author Affiliations +

Proceedings Volume 5228, ECLIM 2002: 27th European Conference on Laser Interaction with Matter; (2003) https://doi.org/10.1117/12.537114
Event: ECLIM 2002: 27th European conference on Laser Interaction with Matter, 2002, Moscow, Russian Federation

Abstract

Employing the crossed-beams technique, we have studied the interaction of fullerene ions both with electrons and He²⁺ ions. For fullerene ions C₆₀^q+ (q = 1,2,3), absolute cross sections have been measured for C₂-fragmentation at electron energies up to 1 keV. The cross sections for the loss of a C₂ molecule indicate the presence of two different mechanisms. For negatively-charged fullerene ions C_m^- (m = 60, 70, 84), absolute cross sections for multiple-ionization and fragmentation into product ions C_m-n^q+ (q = 1,2,3 and n = 0,2,3) have been measured in the same range of electron energies. A novel ionization mechanism is proposed. In a very first ion-ion crossed-beams experiment involving fullerene ions, we have studied the charge transfer in collisions between C₆₀⁺ ions and He²⁺ ions at keV energies. We have also calculated the total cross section for this reaction. Where the fullerene ion is described as an infinitely conducting hard sphere (ICS). The charge transfer S-matrix element was calculated as the electron transition coefficient over the time-dependent potential. For the calculation of the transition coefficients over a non-symmetric barrier, a new efficient method was developed.

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D. Hathiramani, Harald Brauning, Andreas Diehl, A. A. Narits, L. P. Presnyakov, P. Scheier, Alexander Theiss, Roland H. Trassl, and Erhard Salzborn "Investigation of fullerenes in crossed-beam experiments", Proc. SPIE 5228, ECLIM 2002: 27th European Conference on Laser Interaction with Matter, (12 December 2003); https://doi.org/10.1117/12.537114

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