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Desorption of H2, HD, and D2 through Temporary Negative Ion Formation
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. (Materialfysik)ORCID iD: 0000-0003-1711-5595
Department of Physics, Göteborg University.
2012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 109, p. 196102-1-196102-4Article in journal (Refereed) Published
Abstract [en]

Physically adsorbed H2, HD, and D2 desorb via the low-energy 2u+ electron scattering resonance with characteristic electron energy dependent cross sections as we show by desorption and electron energy-loss measurements. Only H2 and HD desorb, for energetic reasons, via excitation of the j = 0 —>2 rotational mode and its subsequent decay into free translational motion, while all three isotopes desorb by direct transitions to unbound continuum states, with a probability close to unity and an unexpectedly weak mass dependence ~m 1/2.

Place, publisher, year, edition, pages
Ridge, NY: APS , 2012. Vol. 109, p. 196102-1-196102-4
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-15408DOI: 10.1103/PhysRevLett.109.196102ISI: 000310852000017OAI: oai:DiVA.org:kau-15408DiVA, id: diva2:564029
Funder
Swedish Research Council, 2010-4324Available from: 2012-11-01 Created: 2012-11-01 Last updated: 2017-12-07Bibliographically approved

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Svensson, Krister

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