Effects of molecular rotation in low-energy electron collisions of
Measurements on the energetic structure of the dissociative recombination rate coefficient in the millielectronvolt range are described for ions produced in the lowest rotational levels by collisional cooling and stored as a fast beam in the magnetic storage ring TSR (Test Storage Ring). The observe...
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Published in | Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences Vol. 364; no. 1848; pp. 2981 - 2997 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
London
The Royal Society
15.11.2006
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Subjects | |
Online Access | Get full text |
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Summary: | Measurements on the energetic structure of the dissociative recombination rate coefficient in the millielectronvolt range are described for ions produced in the lowest rotational levels by collisional cooling and stored as a fast beam in the magnetic storage ring TSR (Test Storage Ring). The observed resonant structure is consistent with that found previously at the storage ring facility CRYRING in Stockholm, Sweden; theoretical predictions yield good agreement on the overall size of the rate coefficient, but do not reproduce the detailed structure. First studies on the nuclear spin symmetry influencing the lowest level populations show a small effect different from the theoretical predictions. Heating processes in the residual gas and by collisions with energetic electrons, as well as cooling owing to interaction with cold electrons, were observed in long-time storage experiments, using the low-energy dissociative recombination rate coefficient as a probe, and their consistency with the recent cold measurements is discussed. |
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Bibliography: | istex:0B9002D0CF76A1BC2C1D93F76D5DB42BAF7D7FF3 href:2981.pdf Present address: Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA. ArticleID:rsta20061881 ark:/67375/V84-SB8VMRLS-H Discussion Meeting Issue 'Physics, chemistry and astronomy of H 3 +' organized by Takeshi Oka |
ISSN: | 1364-503X 1471-2962 |
DOI: | 10.1098/rsta.2006.1881 |