Vibrational Scattering Anisotropy Generated by Multichannel Quantum Interference
2010 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 105, no 9, 093002- p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:kth:diva-26817DOI: 10.1103/PhysRevLett.105.093002ISI: 000281272700006ScopusID: 2-s2.0-77956284234OAI: oai:DiVA.org:kth-26817DiVA: diva2:375605
QC 201012082010-12-082010-11-292016-10-13Bibliographically approved