Photoelectron spectroscopy of large water clusters ionized by an XUV comb

Trabattoni, Andrea; Colaizzi, Lorenzo; Ban, Loren; Wanie, Vincent; Saraswathula, Krishna; Mansson, Erik P.; Rupp, Philipp; Liu, Qingcao; Seiffert, Lennart; Herzig, Elisabeth A.; Cartella, Andrea; Yoder, Bruce L.; Legare, Francois; Kling, Matthias F.; Fennel, Thomas; Signorell, Ruth und Calegari, Francesca (2020): Photoelectron spectroscopy of large water clusters ionized by an XUV comb. In: Journal of Physics-Photonics, Bd. 2, Nr. 3, 035007

Abstract

Detailed knowledge about photo-induced electron dynamics in water is key to the understanding of several biological and chemical mechanisms, in particular for those resulting from ionizing radiation. Here we report a method to obtain photoelectron spectra from neutral water clusters following ionization by an extreme-ultraviolet (XUV) attosecond pulse train, representing a first step towards a time-resolved analysis. Typically, a large Background: signal in the experiment arises from water monomers and carrier gas used in the cluster source. We report a protocol to quantify this Background: in order to eliminate it from the experimental spectra. We disentangle the accumulated XUV photoionization signal into contributions from the Background: species and the photoelectron spectra from the clusters. This proof-of-principle study demonstrates feasibility of Background: free photoelectron spectra of neutral water clusters ionized by XUV combs and paves the way for the detailed time-resolved analysis of the underlying dynamics.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2515-7647
• Sprache: Englisch