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Ultrafast dynamics ...
Ultrafast dynamics of 2-thiouracil investigated by time-resolved Auger spectroscopy
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Lever, F. (author)
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Mayer, D. (author)
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Picconi, D. (author)
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Metje, J. (author)
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Alisauskas, S. (author)
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Calegari, F. (author)
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Düsterer, S. (author)
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Ehlert, C. (author)
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- Feifel, Raimund (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Niebuhr, M. (author)
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Manschwetus, B. (author)
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Kuhlmann, M. (author)
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Mazza, T. (author)
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Robinson, M.S. (author)
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- Squibb, Richard J. (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Trabattoni, A. (author)
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- Wallner, Måns, 1992 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Saalfrank, P. (author)
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Wolf, T.J.A. (author)
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Gühr, M. (author)
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(creator_code:org_t)
- 2020-12-17
- 2020
- English.
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In: Journal of Physics B: Atomic, Molecular and Optical Physics. - : IOP Publishing. - 0953-4075 .- 1361-6455. ; 54
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Abstract
Subject headings
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- We present time-resolved ultraviolet-pump x-ray probe Auger spectra of 2-thiouracil. An ultraviolet induced shift towards higher kinetic energies is observed in the sulfur 2p Auger decay. The difference Auger spectra of pumped and unpumped molecules exhibit ultrafast dynamics in the shift amplitude, in which three phases can be recognized. In the first 100 fs, a shift towards higher kinetic energies is observed, followed by a 400 fs shift back to lower kinetic energies and a 1 ps shift again to higher kinetic energies. We use a simple Coulomb-model, aided by quantum chemical calculations of potential energy states, to deduce a C–S bond expansion within the first 100 fs. The bond elongation triggers internal conversion from the photoexcited S2 to the S1 state. Based on timescales, the subsequent dynamics can be interpreted in terms of S1 nuclear relaxation and S1-triplet internal conversion.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Lever, F.
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Mayer, D.
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Picconi, D.
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Metje, J.
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Alisauskas, S.
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Calegari, F.
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show more...
-
Düsterer, S.
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Ehlert, C.
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Feifel, Raimund
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Niebuhr, M.
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Manschwetus, B.
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Kuhlmann, M.
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Mazza, T.
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Robinson, M.S.
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Squibb, Richard ...
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Trabattoni, A.
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Wallner, Måns, 1 ...
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Saalfrank, P.
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Wolf, T.J.A.
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Gühr, M.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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Journal of Physi ...
- By the university
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University of Gothenburg