Abstract
Using blue tunable pulse laser radiation of low fluence, we have investigated laser-induced sputtering from cleaved BaF2 (111) surfaces under ultrahigh vacuum conditions. Timecorrelated with the laser pulses we observed the positiveions Ba+, Ba++, (BaF)+, and F+. Practically no negative ions were found. Neutral atomic fluorine (F°) was desorbed abundantly. A pulse correlation of F° as well as the relative amount of F° and F+ could not be established at this stage. The emission yield of all positive ions as well as of F° was strongly wavelength dependent and showed a broad resonance around 2.9 eV.
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