| Autor: |
Poutsma, John C., Shuman, Nicholas S., Miller, Thomas M., Troe, Jürgen, Viggiano, Albert A. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 3/31/2020, Vol. 152 Issue 12, p1-6, 6p, 1 Chart, 2 Graphs |
| Abstrakt: |
New flowing afterglow/Langmuir probe investigations of electronic attachment to SF6 are described. Thermal attachment rate constants are found to increase from 1.5 × 10−7 cm3 s−1 at 200 K to 2.3 × 10−7 cm3 s−1 at 300 K. Attachment rate constants over the range of 200–700 K (from the present work and the literature), together with earlier measurements of attachment cross sections, are analyzed with respect to electronic and nuclear contributions. The latter suggest that only a small nuclear barrier (of the order of 20 meV) on the way from SF6 to SF6− has to be overcome. The analysis shows that not only s-waves but also higher partial waves have to be taken into account. Likewise, finite-size effects of the neutral target contribute in a non-negligible manner. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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