Non-adiabatic effects in the oxidation of alkali metals [Elektronische Ressource] / von David Krix

Description

Non-adiabatic Effects in theOxidation of Alkali MetalsVon der Fakultat fur Physik der Universitat Duisburg-Essen¨ ¨ ¨zur Erlangung des akademischen GradesDr. rer. nat.genehmigte DissertationvonDavid Krixaus Bottrop16. September 20101. Gutachter: Prof. Dr. Hermann Nienhaus2.hter: Prof. Dr. Marika Schleberger3. Gutachter: Prof. Dr. Rainer BeckVorsitz der Prufungsaussc¨ husses: Prof. Dr. Peter KratzerWeiteres Mitglied des Prufungsausschusses: Prof. Dr. Axel Lorke¨Tag der mundlic¨ hen Prufung:¨ 3. Februar 2011Meinen ElternAbstractNon-adiabatic effects during the oxidation of alkali metal surfaces were studied. For thispurpose thin film Schottky diodes based on silicon substrates were developed. The diodeswere used to detect low lying electron-hole pair excitations leading to chemicurrentsthrough the devices. The chemicurrent concept has been combined with a setup todetect highly energetic exoelectrons emitted in the cause of the reactions. In contrast toprevious studies, it has been found that the chemicurrent is not simply proportional tothe reaction rate. Exposure dependent chemicurrent and exoemission efficiencies haveto be assumed to correctly describe the time evolution of chemicurrent and exoemissiontraces.Most experiments were carried for liquid nitrogen cooled samples at a temperature of120 K.

Sujets

• Physik

Informations

• Publié par: universitat_duisburg-essen
• Publié le: 01 janvier 2010
• Nombre de lectures: 17
• Langue: English
• Poids de l'ouvrage: 3 Mo

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