Size-dependent ultrafast ionization dynamics of nanoscale samples in intense femtosecond x-ray free-electron-laser pulses

Sebastian Schorb, Daniela Rupp, Michelle L. Swiggers, Ryan N. Coffee, Marc Messerschmidt, Garth Williams, John D. Bozek, Shin Ichi Wada, Oleg Kornilov, Thomas Möller, Christoph Bostedt

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Abstract

All matter exposed to intense femtosecond x-ray pulses from the Linac Coherent Light Source free-electron laser is strongly ionized on time scales competing with the inner-shell vacancy lifetimes. We show that for nanoscale objects the environment, i.e., nanoparticle size, is an important parameter for the time-dependent ionization dynamics. The Auger lifetimes of large Ar clusters are found to be increased compared to small clusters and isolated atoms, due to delocalization of the valence electrons in the x-ray-induced nanoplasma. As a consequence, large nanometer-sized samples absorb intense femtosecond x-ray pulses less efficiently than small ones.

Original languageEnglish (US)
Article number233401
JournalPhysical Review Letters
Volume108
Issue number23
DOIs
StatePublished - Jun 5 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Schorb, S., Rupp, D., Swiggers, M. L., Coffee, R. N., Messerschmidt, M., Williams, G., Bozek, J. D., Wada, S. I., Kornilov, O., Möller, T., & Bostedt, C. (2012). Size-dependent ultrafast ionization dynamics of nanoscale samples in intense femtosecond x-ray free-electron-laser pulses. Physical Review Letters, 108(23), [233401]. https://doi.org/10.1103/PhysRevLett.108.233401