skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms

Abstract

Absolute dissociation cross sections are reported for H{sub n}{sup +} clusters of varied mass (n=3,5,...,35) following collisions with He atoms at 60 keV/amu. Initial results have been published previously 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 quasilinear dependence of the H{sub n}{sup +} dissociation cross sections upon n is developed with reference to expected series of geometrical shells of H{sub 2} molecules surrounding a H{sub 3}{sup +} core. Recent calculations identify n=9 as corresponding to the first closed H{sub 2} 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)].

Authors:
; ; ; ; ; ; ;  [1];  [2]
  1. Institut de Physique Nucleaire de Lyon, IN2P3-CNRS et Universite Claude Bernard Lyon 1, 43, boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex (France)
  2. (Austria)
Publication Date:
OSTI Identifier:
20974596
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.73.023201; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMIC CLUSTERS; ATOMS; CROSS SECTIONS; DISSOCIATION; HELIUM; HYDROGEN IONS 3 PLUS; ION PAIRS; ION-ATOM COLLISIONS; KEV RANGE; MOLECULES; SHELLS

Citation Formats

Eden, S., Tabet, J., Samraoui, K., Louc, S., Farizon, B., Farizon, M., Ouaskit, S., Maerk, T. D., and Institut fuer Ionenphysik, Leopold Franzens Universitaet, Technikerstrasse 25, A-6020 Innsbruck. Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.023201.
Eden, S., Tabet, J., Samraoui, K., Louc, S., Farizon, B., Farizon, M., Ouaskit, S., Maerk, T. D., & Institut fuer Ionenphysik, Leopold Franzens Universitaet, Technikerstrasse 25, A-6020 Innsbruck. Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms. United States. doi:10.1103/PHYSREVA.73.023201.
Eden, S., Tabet, J., Samraoui, K., Louc, S., Farizon, B., Farizon, M., Ouaskit, S., Maerk, T. D., and Institut fuer Ionenphysik, Leopold Franzens Universitaet, Technikerstrasse 25, A-6020 Innsbruck. Wed . "Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms". United States. doi:10.1103/PHYSREVA.73.023201.
@article{osti_20974596,
title = {Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atoms},
author = {Eden, S. and Tabet, J. and Samraoui, K. and Louc, S. and Farizon, B. and Farizon, M. and Ouaskit, S. and Maerk, T. D. and Institut fuer Ionenphysik, Leopold Franzens Universitaet, Technikerstrasse 25, A-6020 Innsbruck},
abstractNote = {Absolute dissociation cross sections are reported for H{sub n}{sup +} clusters of varied mass (n=3,5,...,35) following collisions with He atoms at 60 keV/amu. Initial results have been published previously 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 quasilinear dependence of the H{sub n}{sup +} dissociation cross sections upon n is developed with reference to expected series of geometrical shells of H{sub 2} molecules surrounding a H{sub 3}{sup +} core. Recent calculations identify n=9 as corresponding to the first closed H{sub 2} 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)].},
doi = {10.1103/PHYSREVA.73.023201},
journal = {Physical Review. A},
number = 2,
volume = 73,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}