| Abstract
| - An aniline solution in 1-propanol, or a pure ethanol liquid, was introduced into vacuum as a continuousliquid flow (liquid beam) and was irradiated with a 266-nm laser. Ions were produced in the liquid beam bymultiphoton absorption and partially ejected into the vacuum. The abundance of ions remaining inside theliquid beam and that ejected in the gas phase were measured simultaneously by using an inductive detectorand a time-of-flight mass spectrometer, respectively, as a function of irradiation-laser power. The result isexplained by the Coulomb ejection model for the ion ejection from the liquid surface. The essential featurechanges slightly with the rate of the ion diffusion with respect to that of the ion ejection.
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