journal article·2023-01-12Open access

Controlling Fragmentation of the Acetylene Cation in the Vacuum Ultraviolet via Transient Molecular Alignment

L. Varvarezos, J. Delgado-Guerrero, M. Di Fraia, T. J. Kelly, A. Palacios, C. Callegari, A. L. Cavalieri, R. Coffee, M. Danailov, P. Decleva, A. Demidovich, L. DiMauro, S. Düsterer, L. Giannessi, W. Helml, M. Ilchen, R. Kienberger, T. Mazza, M. Meyer, R. Moshammer, C. Pedersini, O. Plekan, K. C. Prince, A. Simoncig, A. Schletter, K. Ueda, M. Wurzer, M. Zangrando, F. Martín, J. T. Costello

Abstract

An open-loop control scheme of molecular fragmentation based on transient molecular alignment combined with single-photon ionization induced by a short-wavelength free electron laser (FEL) is demonstrated for the acetylene cation. Photoelectron spectra are recorded, complementing the ion yield measurements, to demonstrate that such control is the consequence of changes in the electronic response with molecular orientation relative to the ionizing field. We show that stable C2H2+ cations are mainly produced when the molecules are parallel or nearly parallel to the FEL polarization, while the hydrogen fragmentation channel (C2H2+ → C2H+ + H) predominates when the molecule is perpendicular to that direction, thus allowing one to distinguish between the two photochemical processes. The experimental findings are supported by state-of-the art theoretical calculations.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Laser-Matter Interactions and Applications · Advanced Chemical Physics Studies · Mass Spectrometry Techniques and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9, Ireland

Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain

Instituto Madrileño de Estudios Advanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain

Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy

Department of Computer Science and Applied Physics, Atlantic Technological University, T91 T8NW Galway, Ireland

Institute for Advanced Research in Chimical Sciences, Universidad Autónoma de Madrid, 28049 Madrid, Spain

Institute of Applied Physics, University of Bern, 3012 Bern, Switzerland

Paul Scherrer Institute, 5232 Villigen PSI, Switzerland

Linac Coherent Light Source/SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States

Istituto Officina dei Materiali IOM-CNR and Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, 34121 Trieste, Italy

Department of Physics, The Ohio State University, Columbus, Ohio 43210, United States

Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany

Fakultät Physik, Technische Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, 44227 Dortmund, Germany

Institut fur Physik und CINSaT, Universitat Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany

Physics Department, Technische Universität München, 85748 Garching, Germany

Max-Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne, Victoria 3122, Australia

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan

Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy

Condensed Matter Physics Center, Universidad Autónoma de Madrid, 28049 Madrid, Spain

Funding

Comunidad de Madrid · Science Foundation Ireland · Ministerio de Ciencia e Innovaci?n · Sustainable Energy Authority of Ireland · Deutsche Forschungsgemeinschaft · European Cooperation in Science and Technology · Education, Audiovisual and Culture Executive Agency

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