Field ion emission: the effect of electrostatic field energy on the prediction of evaporation field and charge state
作者： Dinko N Zurlev , Richard G Forbes
DOI: 10.1088/0022-3727/36/17/104
关键词: Unexpected finding 、 Activation energy 、 Ion emission 、 Surface field 、 Chemistry 、 Atomic physics 、 Electric field 、 Valence (chemistry) 、 Ion
摘要: New calculations of evaporation field are reported that use Muller's formula but include an electrostatic field-energy term resulting from the change in electrical capacity when a surface atom is evaporated. An unexpected finding that, for significant number materials, solutions to equation do not exist some charge states. With exceptions, these mathematical results correlate well with observations states evaporated ions. The inclusion gives improved agreement between predicted values zero activation energy and experimentally derived estimates this field, discrepancies remain be explained. Quantum-mechanical will need take into account term.
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