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Vibrational Scattering Anisotropy Generated by Multichannel Quantum Interference
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2010 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 105, no 9, 093002- p.Article in journal (Refereed) Published
Abstract [en]

Based on angularly and vibrationally resolved electron spectroscopy measurements in acetylene, we report the first observation of anomalously strong vibrational anisotropy of resonant Auger scattering through the C 1s --> pi* excited state. We provide a theoretical model explaining the new phenomenon by three coexisting interference effects: (i) interference between resonant and direct photoionization channels, (ii) interference of the scattering channels through the core-excited bending states with orthogonal orientation of the molecular orbitals, (iii) scattering through two wells of the double-well bending mode potential. The interplay of nuclear and electronic motions offers in this case a new type of nuclear wave packet interferometry sensitive to the anisotropy of nuclear dynamics: whether which-path information is available or not depends on the final vibrational state serving for path selection.

Place, publisher, year, edition, pages
2010. Vol. 105, no 9, 093002- p.
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Physical Sciences
URN: urn:nbn:se:kth:diva-26817DOI: 10.1103/PhysRevLett.105.093002ISI: 000281272700006ScopusID: 2-s2.0-77956284234OAI: diva2:375605
QC 20101208Available from: 2010-12-08 Created: 2010-11-29 Last updated: 2016-10-13Bibliographically approved

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Kimberg, VictorGavrilyuk, SergeyGel'mukhanov, Faris
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School of Biotechnology (BIO)Theoretical Chemistry (closed 20110512)
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