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Vacuum space charge effects in sub-picosecond soft X-ray photoemission on a molecular adsorbate layer
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Number of Authors: 19
2015 (English)In: structural dynamics us, ISSN 2329-7778, Vol. 2, no 2, 025101Article in journal (Refereed) Published
Abstract [en]

Vacuum space charge induced kinetic energy shifts of O 1s and Ru 3d core levels in femtosecond soft X-ray photoemission spectra (PES) have been studied at a free electron laser (FEL) for an oxygen layer on Ru(0001). We fully reproduced the measurements by simulating the in-vacuum expansion of the photoelectrons and demonstrate the space charge contribution of the high-order harmonics in the FEL beam. Employing the same analysis for 400 nm pump-X-ray probe PES, we can disentangle the delay dependent Ru 3d energy shifts into effects induced by space charge and by lattice heating from the femtosecond pump pulse.

Place, publisher, year, edition, pages
2015. Vol. 2, no 2, 025101
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Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-118293DOI: 10.1063/1.4914892ISI: 000354994100009OAI: oai:DiVA.org:su-118293DiVA: diva2:823479
Available from: 2015-06-18 Created: 2015-06-15 Last updated: 2015-06-18Bibliographically approved

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Gladh, JörgenNilsson, AndersSellberg, Jonas A.Öström, Henrik
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