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Phys. Rev. A 71, 062704 (2005) [9 pages]

Ionization of hydrogen molecular ions by antiproton impacts

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Kazuhiro Sakimoto
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Yoshinodai, Sagamihara 229-8510, Japan

Received 26 January 2005; published 15 June 2005

Ionization cross sections in collisions of antiprotons (p̅ ) with H2+ molecules are calculated for incident energies in the range of 2–500 keV by using a semiclassical impact-parameter method. The electronic motion is solved in a numerically accurate manner by means of a discrete variable representation. A sudden approximation is applied to the description of the molecular rotation and vibration. The present p̅ +H2+ ionization cross sections are compared with the theoretical results of the ionization in p̅ +He+ and the experimental results of the production of H+ ions in p̅ +H2.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.71.062704
DOI:
10.1103/PhysRevA.71.062704
PACS:
34.50.Gb, 36.10.−k