Photoionization and photofragmentation of multiply charged Lu3N@C80 ions

Hellhund, J. and Borovik, A. Jr. and Holse, K. and Klumpp, S. and Martins, M. and Ricz, Sándor and Schippers, S. and Müller, A. (2015) Photoionization and photofragmentation of multiply charged Lu3N@C80 ions. Physical Review A, 92. pp. 1-9. ISSN 1050-2947

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Abstract

Relative cross sections for photoionization of endohedral fullerene ions Lu3N@C80 q+ (q = 1,2,3) have been measured employing the photon-ion merged-beam technique. The investigations include various ionization channels Lu3N@C80 +q→+p (q = 1,2,3 and p = 2,3,4,5,6), in some cases accompanied by fragmentation of the carbon cage. Prominent structures related to the carbon K-shell ionization threshold were observed in the energy range 280–330 eV. These resonance structures have been analyzed in seven product channels and are compared with previously known absorption spectra of several fullerene species. Within the statistical significance of the data, we do not observe any signatures of the N 1s and Lu 3d thresholds in the energy ranges 390–435 eV and 1500–1700 eV, respectively. By comparing the energies for double ionization of Lu3N@C80 + and Lu3N@C80 2+ at the carbon 1s K-shell threshold, we derive a value of 5.0 ± 0.4 °A for the radius of the carbon cage.

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