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キーワード:
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要旨:
The non-adiabatic reaction leading to the emission of exoelectrons during the adsorption of oxygen on lithium is exploited to estimate the time that elapses during the dissociation of the molecule. With a three-step model the exoemission probability is calculated. A comparison with experimentally observed probabilities predicts the reaction time to be 75±25 O2p hole lifetimes at the final O2p binding energy. The width of the exoelectron energy distribution reflects this hole lifetime. The absence of visible light emission ( < 10−10 photons/O2) is shown to be compatible with the model.
