H_5^+团簇离子及其中性团簇产物H_3和H_4

H_5^+ cluster ion and its neutral products H_3 and H_4

报道了H+5的实验结果 .分析讨论了H+5的形成和分解途径 .根据理论分析 ,以稳定的H+3为核心与一个或多个氢分子结合可能形成稳定的H+n 氢团簇离子 .另一方面 ,在高频离子源中 ,有发生H+3与H2 反应的条件 .实验中 ,从高频离子源引出的离子束被静电加速器加速 ,然后用 90°磁分析器选择质量数为 5的离子 ,再将这些离子偏转 2 0° ,最后在 2 0°方向测量它们的能谱 .从能谱发现 ,在高频离子源中可能通过H+3与H2 的离子 分子反应形成了H+5团簇离子 ;并且在H+5的分解产物中还发现可能存在H3和H4 等中性团簇产物 .

The experimental results for H-5(+) cluster ions are reported. The formation and dissociation of H-5(+) cluster ions were discussed. According to theory, stable H-n(+) cluster ions may be formed by H-3(+) core with one or more H-2 molecule. On the other hand there exist conditions for the reaction of H-3(+) and H-2 in a rf ion source. In the experiments, the ion beam was accelerated by van de Graff and selected by 90degrees analysis magnet in the condition of current for mass number 5, and then diffracted by 200 analysis magnet, the energy spectrum of ion beam was obtained. From the spectrum, it is found that H-5(+) cluster ions may be formed from the ion-molecular interaction between H-3(+) ion and H-2 neutral molecule in rf ion source and that there may exist H-3 and H-4 neutral clusters among the products of H-5(+) cluster ions.