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EnglishAn energetic beam of Xe atoms causes the dissociation of adsorbed O-2 molecules on cold Ag(110) or Pt(111) surfaces. This is a parallel channel to the previously observed collision induced desorption. Using EELS, mass spectrometry and TDS, the energy dependence of the collision induced dissociation and desorption cross sections was measured over a range of Xe beam energies, On both surfaces these events seem to have a common threshold energy of about 0.9 eV for Ag(110) and 1.2 eV for Pt(111). The branching ratios between desorption and dissociation, which are about 3 and 3.3 for Ag(110) and Pt(111), respectively, exhibit no or weak energy dependence.
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| Titolo: | Dissociation of O2 chemisorbed on Ag (110) and Pt(111) induced by energetic Xe atoms |
| Autori: | |
| Data di pubblicazione: | 1997 |
| Rivista: | |
| Abstract: | An energetic beam of Xe atoms causes the dissociation of adsorbed O-2 molecules on cold Ag(110) or Pt(111) surfaces. This is a parallel channel to the previously observed collision induced desorption. Using EELS, mass spectrometry and TDS, the energy dependence of the collision induced dissociation and desorption cross sections was measured over a range of Xe beam energies, On both surfaces these events seem to have a common threshold energy of about 0.9 eV for Ag(110) and 1.2 eV for Pt(111). The branching ratios between desorption and dissociation, which are about 3 and 3.3 for Ag(110) and Pt(111), respectively, exhibit no or weak energy dependence. |
| Handle: | http://hdl.handle.net/11567/303769 |
| Appare nelle tipologie: | 01.01 - Articolo su rivista |
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