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Absolute cross sections for anion production by low energy electron impact on physisorbed CO2

✍ Scribed by M.A. Huels; A.D. Bass; P. Ayotte; L. Sanche

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 470 KB
Volume: 245
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)01029-9

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✦ Synopsis

Total charge trapping cross sections are reported for CO 2 physisorbed onto multilayer Kr substrates. For incident electron energies between l and 14 eV, charge trapping proceeds via a dissociative electron attachment (DEA) mechanism, related to that observed in the gas phase. However, near 9.7 eV, coupling between CO~-and Kr *-states results in a significant increase in DEA, and hence charge trapping. Between 1 and 6 eV, we measure absolute total cross sections for anion production with peak values approximately 43 times larger than those for gas phase CO2; this is attributed to effects of the solid's polarization energy.

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