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Berlin 2001 – scientific programme

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MO: Molekülphysik

MO 8: Posters Thursday: Dissociation and other Collision Processes

MO 8.15: Poster

Thursday, April 5, 2001, 12:30–15:00, AT3

Dissociative recombination and excitation of H3+ — •Marie J. Jensen1, Henrik B. Pedersen2, C. P. Safvan1, Klaus Seiersen1, Xavier Urbain3, and Lars H. Andersen11Institute of Physics and Astronomy, University of Aarhus, DK-8000 Århus C, Denmark — 2Department of Particle Physics, Weizmann Institute of Science, Rehovot, 76100, Israel — 3Départment de Physique, Université Catholique de Louvain, B1348, Louvain-la-Neuve, Belgium

Using the ASTRID heavy-ion storage ring, absolute cross sections for dissociative recombination and dissociative excitation of vibrationally cold H3+ have been measured as a function of energy in the region E=0−34 eV. A thermal rate coefficient for dissociative recombination of (1.0±0.2)·10−7 cm3s−1 at 300 K has been derived from cross sections at low energy. At high energy, capture into a group of doubly-excited states of H3 gives rise to resonances in the dissociative recombination as well as in the dissociative excitation cross sections.

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