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Time-resolved photoelectron spectroscopy on small tungsten cluster anions
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2010 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, E-ISSN 1432-0630, Vol. 100, no 1, 21-29 p.Article in journal (Refereed) Published
Abstract [en]

We have studied the dynamics of photoexcited tungsten cluster anions W-n(-) (n = 3,4, ..., 14) by means of time-resolved two-photon photodetachment spectroscopy. At an excitation energy of h nu (pump)=1.56 eV the photoinduced dynamics is mainly dominated by fast electronic relaxation processes. For the smallest clusters, i.c., W-3(-), W-4(-), and W-5(-), individual relaxation channels have been identified and resolved on a timescale well below 100 fs. The time constants for the decay of nascent and secondary electrons have been deduced from a Bloch model. Complete thermalization takes place for all clusters on a timescale of similar to 1 ps.

Place, publisher, year, edition, pages
2010. Vol. 100, no 1, 21-29 p.
National Category
Physical Sciences Engineering and Technology
URN: urn:nbn:se:uu:diva-136170DOI: 10.1007/s00339-010-5611-6ISI: 000279127700004OAI: oai:DiVA.org:uu-136170DiVA: diva2:376324
Available from: 2010-12-10 Created: 2010-12-10 Last updated: 2014-03-04Bibliographically approved

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