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Pulses from a CO 2 - and a N 2 -laser are focused onto a zirconium target, and the released atomic beams are analysed by the laser-induced fluorescence technique at various distances from the target surface. The average beam velocity exceeds quite drastically the velocity expected from any thermal model; the populations of the fine structure levels of the ground-state, on the other hand, correspond to a temperature below the expected lattice temperature. The influence of surface oxygen is investigated.
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Leismann et al. (1984) studied this question.
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