Varvarezos, L; Delgado-Guerrero, J; Di Fraia, M; Kelly, T J; Palacios, A; Callegari, C; Cavalieri, A L; Coffee, R; Danailov, M; Decleva, P; Demidovich, A; DiMauro, L; Düsterer, S; Giannessi, L; Helml, W; Ilchen, M; Kienberger, R; Mazza, T; Meyer, M; Moshammer, R; ... (2023). Controlling Fragmentation of the Acetylene Cation in the Vacuum Ultraviolet via Transient Molecular Alignment. The journal of physical chemistry letters, 14(1), pp. 24-31. American Chemical Society 10.1021/acs.jpclett.2c03354
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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.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Applied Physics |
UniBE Contributor: |
Cavalieri, Adrian Liebe |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1948-7185 |
Publisher: |
American Chemical Society |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
10 Jan 2023 13:24 |
Last Modified: |
13 Jan 2023 00:16 |
Publisher DOI: |
10.1021/acs.jpclett.2c03354 |
PubMed ID: |
36562987 |
BORIS DOI: |
10.48350/176487 |
URI: |
https://boris.unibe.ch/id/eprint/176487 |
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