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What follows is a short report on the Business Meeting of the Astronomy and World Heritage Working Group held on Thursday August 6, 2009. This was the first formal Business Meeting of the Working Group since its formation following the signing of the Memorandum of Understanding between the IAU and UNESCO on Astronomy and World Heritage in October 2008.
Rare gas or lead clusters of several hundreds to many thousands
of atoms per cluster were irradiated by intense laser pulses
producing peak intensities up to 1017W/cm2.
Fast, highly charged fragment ions were observed by means of
standard TOF mass spectrometry as well as a magnetic deflection
TOF device (MDTOF). Charge states of up to Xe30+
or Pb18+ were detected with maximum kinetic energies
reaching far beyond 100 keV for Xe. A strong dependence of the
charging and heating process on the laser pulse duration was
found. While the resulting ionic fragment spectra are qualitatively
similar for rare gas and lead clusters, the kinetic energies for the
metal clusters seem to be significantly lower.
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