Electron or photon irradiation on H₂O adsorbed on the surface of rare gas solids induces theuddesorption of protonated water clusters, (H₂O)nH⁺. The yield and the size n distribution of clusterudions depend on the coverage, the deposition temperature of water and the thickness of a rare gasudfilm. These results indicate that the (H₂O)nH⁺ ions are originated from the isolated water clusterudand most important factor determining the size n distribution of desorbed (H₂O)nH⁺ is the sizes ofudwater islands on rare gas solid. The measurement of kinetic energy distributions indicated that theuddesorbing energy of clusters depend on the rare gas species of the substrates and the cluster size. Itudis suggested that the (H₂O)nH⁺ desorption is due to Coulomb repulsion between the ionic waterudcluster and the rare gas ion.
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机译：用电子或光子照射稀有气体固体表面上吸附的H 2 O会引起质子化水簇（H 2 O）n H 4的解吸。团簇/颗粒的产量和大小n分布取决于覆盖率，水的沉积温度和稀有气体 udfilm的厚度。这些结果表明，（H 2 O）n H 4离子起源于孤立的水簇，决定脱附的（H 2 O）n H 3的大小n分布的最重要因素是稀有气体固体上的水岛的大小。动能分布的测量表明，团簇的解吸能取决于底物的稀有气体种类和团簇的大小。据推测，（H 2 O）n H 3的解吸是由于离子水团簇与稀有气体离子之间的库仑排斥。
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