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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Interference in strong-field ionization of a two-centre atomic system

Z Ansari1, M Böttcher1, B Manschwetus1, H Rottke1,6, W Sandner1, A Verhoef2, M Lezius2, G G Paulus3, A Saenz4 and D B Milošević5

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Strong-field photoionization of argon dimers by a few-cycle laser pulse is investigated using electron–ion coincidence momentum spectroscopy. The momentum distribution of the photoelectrons exhibits interference due to the emission from the two atomic argon centres, in analogy with a Young's double-slit experiment. However, a simulation of the dimer photoelectron momentum spectrum based on the atomic spectrum supplemented with a theoretically derived interference term leads to distinct deviations from the experimental result. The deviations may have their origin in a complex electron dynamics during strong-field ionization of the Ar2 dimer.


PACS

33.80.Eh Autoionization, photoionization, and photodetachment

33.60.+q Photoelectron spectra

Subjects

Atomic and molecular physics

Dates

Issue 9 (September 2008)

Received 24 June 2008

Published 25 September 2008



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