dorsal/arxiv
View SchemaAbsolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms
| Authors | S. Eden, J. Tabet, K. Samraoui, S. Louc, B. Farizon, M. Farizon, S. Ouaskit, T. D. Märk |
|---|---|
| Categories | |
| ArXiv ID | physics/0601076 |
| URL | https://arxiv.org/abs/physics/0601076 |
| DOI | 10.1103/PhysRevA.73.023201 |
| Journal | Physical Review A 73 (2006) 023201 |
Abstract
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)].
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"abstract": "Absolute dissociation cross sections are reported for Hn+ clusters of varied\nmass (n = 3, 5, ..., 35) following collisions with He atoms at 60 keV / amu.\nInitial results have been published in a previous brief report for a smaller\nrange of cluster sizes [Ouaskit et al., Phys. Rev. A 49, 1484 (1994)]. The\npresent extended study includes further experimental results, reducing the\nstatistical errors associated with the absolute cross sections. The previously\nsuggested quasi-linear dependence of the Hn+ dissociation cross sections upon n\nis developed with reference to expected series of geometrical shells of H2\nmolecules surrounding an H3+ core. Recent calculations identify n = 9 as\ncorresponding to the first closed H2 shell [e.g. Stich et al., J. Chem. Phys.\n107, 9482 (1997)]. Recurrence of the distinct characteristics observed in the\ndissociation cross section dependence upon cluster size around n = 9 provides\nthe basis for the presently proposed subsequent closed shells at n = 15, 21,\n27, and 33, in agreement with the calculations of Nagashima et al. [J. Phys.\nChem. 96, 4294 (1992)].",
"arxiv_id": "physics/0601076",
"authors": [
"S. Eden",
"J. Tabet",
"K. Samraoui",
"S. Louc",
"B. Farizon",
"M. Farizon",
"S. Ouaskit",
"T. D. M\u00e4rk"
],
"categories": [
"physics.atm-clus"
],
"doi": "10.1103/PhysRevA.73.023201",
"journal_ref": "Physical Review A 73 (2006) 023201",
"title": "Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms",
"url": "https://arxiv.org/abs/physics/0601076"
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