Emission of Thermally Activated Electrons from Rare Gas Clusters Irradiated with Intense VUV Light Pulses from a Free Electron Laser

Journal Article · Fri Aug 05 04:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.063402· OSTI ID:20699289

Laarmann, T ^[1]; Rusek, M ^[2]; Wabnitz, H ^[3]; Schulz, J ^[4]; Castro, A R.B. de ^[5]; Guertler, P; Laasch, W ^[6]; Moeller, T ^[7]

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1. Max-Born-Institute, Max-Born Strasse 2a, D-12489 Berlin (Germany)
2. Institute of Physics, Polish Academy of Science, Aleja Lotnikow 32/46, 02-668 Warsaw (Poland)
3. CEA-SPAM, Batiment 522, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette (France)
4. MAX-lab, Box 118, 22100 Lund (Sweden)
5. LNLS, 13084-971 Campinas SP, Brazil and IFGW-UNICAMP, 13083-970 Campinas SP (Brazil)
6. Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg (Germany)
7. Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin (Germany)

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 ({approx}13 eV photon energy) and a peak intensity of {approx}4x10{sup 12} W/cm{sup 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.

• OSTI ID: 20699289
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOMIC CLUSTERS
ELECTRON EMISSION
ELECTRONS
EV RANGE 10-100
FAR ULTRAVIOLET RADIATION
FREE ELECTRON LASERS
KINETIC ENERGY
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
PHOTON BEAMS
PHOTON-MOLECULE COLLISIONS
PULSES
THOMAS-FERMI MODEL
TIME DEPENDENCE
WAVELENGTHS
XENON