Size-Dependent Ultrafast Ionization Dynamics of Nanoscale Samples in Intense Femtosecond X-Ray Free-Electron-Laser Pulses

Autor:	Sebastian Schorb, M. Swiggers, Christoph Bostedt, Thomas Möller, Daniela Rupp, Marc Messerschmidt, Shin-ichi Wada, Garth J. Williams, Oleg Kornilov, Ryan Coffee, John D. Bozek
Rok vydání:	2012
Předmět:	Materials science Free-electron laser General Physics and Astronomy Laser law.invention Auger Delocalized electron law Ionization Femtosecond Physics::Atomic and Molecular Clusters Atomic physics Valence electron Ultrashort pulse
Zdroj:	Physical Review Letters. 108
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.108.233401
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e56ad69287d1c2e71cba4a4a88d7aed5 https://doi.org/10.1103/physrevlett.108.233401 Zobrazit plný text záznamu