Emission of thermally activated electrons from rare gas clusters irradiated with intense VUV light pulses from a free electron laser
ARTIGO
Inglês
Agradecimentos: We thank the TTF team at DESY. This work was financially supported by the DFG
Abstract: 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...
Abstract: 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
Aberto
Emission of thermally activated electrons from rare gas clusters irradiated with intense VUV light pulses from a free electron laser
Emission of thermally activated electrons from rare gas clusters irradiated with intense VUV light pulses from a free electron laser
Fontes
Physical review letters Vol. 95, n. 6 (Aug., 2005), n. art. 063402, p. 1-4 |