Emission of thermally activated electrons from rare gas clusters irradiated with intense VUV light pulses from a free electron laser

The ionization dynamics of Ar and Xe clusters irradiated with intense vacuum ultraviolet light from a free-electron laser is investigated using photoelectron spectroscopy. Clusters comprising between 70 and 900 atoms were irradiated with femtosecond pulses at 95 nm wavelength (similar to 13 eV photon energy) and a peak intensity of similar to 4x10(12) W/cm(2). A broad thermal distribution of emitted electrons from clusters with a maximum kinetic energy up to 30-40 eV is observed. The observation of relatively low-energy photoelectrons is in good agreement with calculations using a time-dependent Thomas-Fermi model and gives experimental evidence of an outer ionization process of the clusters, due to delayed thermoelectronic emission.

Rusek, M (författare)
Wabnitz, H (författare)
Schulz, JoachimLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)maxl-jsc (författare)
de Castro, ARB (författare)
Gurtler, P (författare)
Laasch, W (författare)
Moller, T (författare)
Lunds universitetMAX IV-laboratoriet (creator_code:org_t)

Av författaren/redakt...: Laarmann, T; Rusek, M; Wabnitz, H; Schulz, Joachim; de Castro, ARB; Gurtler, P; visa fler...; Laasch, W; Moller, T; visa färre...

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