Electronic versus vibrational excitation in Heq+ collisions with fullerenes

Autor(en): Schlatholter, T
Hadjar, O
Manske, J
Hoekstra, R
Morgenstern, R
Stichwörter: ATOMS; C-60; CAPTURE; CHARGE-EXCHANGE; DISSOCIATION; ENERGY-LOSS; FRAGMENTATION; fullerenes; highly charged ions; IMPACT IONIZATION; MOLECULAR-IONS; PHOTOFRAGMENTATION; Physics; Physics, Atomic, Molecular & Chemical; Spectroscopy; stopping power
Erscheinungsdatum: 1999
Herausgeber: ELSEVIER SCIENCE BV
Journal: INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
Volumen: 192
Ausgabe: SI
Startseite: 245
Seitenende: 257
Zusammenfassung: 
Collisions of Heq+ ions with neutral fullerenes have been studied as a function of projectile velocity (v approximate to 0.1-1.0 a.u.) and charge state (q = 1, 2). With increasing velocity, two trends are observed for both charge states: The yield of C-60-2m(r+) clusters decreases with 1/v, as expected for quantities related to direct vibrational excitation. The relative cross section for multifragmentation increases linearly with v and can be associated with electronic excitations. The additional potential energy of He2+ with respect to He+ manifests in increased direct ionization cross sections thigh v) and multifragmentation cross sections (low v), respectively, revealing information about coupling times between electronic and vibrational excitation. (C) 1999 Elsevier Science B.V.
ISSN: 13873806
DOI: 10.1016/S1387-3806(99)00108-6

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