Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms
In: Physical Review A Physical Review A, American Physical Society, 2006, 73, pp.023201. ⟨10.1103/PhysRevA.73.023201⟩; (2006)
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Zugriff:
Absolute dissociation cross sections are reported for Hn+ clusters of varied mass (n = 3, 5, ..., 35) following collisions with He atoms at 60 keV / amu. Initial results have been published in a previous brief report for a smaller range of cluster sizes [Ouaskit et al., Phys. Rev. A 49, 1484 (1994)]. The present extended study includes further experimental results, reducing the statistical errors associated with the absolute cross sections. The previously suggested quasi-linear dependence of the Hn+ dissociation cross sections upon n is developed with reference to expected series of geometrical shells of H2 molecules surrounding an H3+ core. Recent calculations identify n = 9 as corresponding to the first closed H2 shell [e.g. Stich et al., J. Chem. Phys. 107, 9482 (1997)]. Recurrence of the distinct characteristics observed in the dissociation cross section dependence upon cluster size around n = 9 provides the basis for the presently proposed subsequent closed shells at n = 15, 21, 27, and 33, in agreement with the calculations of Nagashima et al. [J. Phys. Chem. 96, 4294 (1992)].
Comment: To be published in Physical Review A
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Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms
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Autor/in / Beteiligte Person: | Tabet, J. ; Eden, Samuel ; Louc, S. ; Ouaskit, Said ; Farizon, Bernadette ; Märk, Tilmann D. ; Samraoui, K. ; Farizon, Michel ; Institut de Physique Nucléaire de Lyon (IPNL) ; Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) |
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Quelle: | Physical Review A Physical Review A, American Physical Society, 2006, 73, pp.023201. ⟨10.1103/PhysRevA.73.023201⟩; (2006) |
Veröffentlichung: | arXiv, 2006 |
Medientyp: | unknown |
ISSN: | 1050-2947 (print) ; 1094-1622 (print) |
DOI: | 10.48550/arxiv.physics/0601076 |
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