The first observation of atomic line radiation due to the photon-stimulated desorption of excited neutral atoms is reported. Synchrotron radiation incident on alkali-halide surfaces is found to result in a surprisingly high yield of desorbed excited alkali atoms, more than three orders of magnitude larger than the yield of desorbed ions. Marked structure in the incident-photon-energy-dependent Li* resonance line intensity suggests that the desorption is induced by secondary electronic processes.
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Tolk et al. (1982) studied this question.
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