Penning离子阱中H+,H2+/H,H2反应的研究

用Penning离子阱经碰撞反应H ,H 2/H,H2产生稳定的H n(n=3,4,5,6).高分辨离子谱中除了H ,H 2,H 3和H 5之外,还探测到H 4,H 6.根据Wright和Borkman预言n=4,6的偶数氢团簇离子与对应的n=5,7的奇数离子具有可比较的结合能,由该实验结果可以推断,n=4,6与n=5,7的离子在反应动力学方面具有相近的性质,都能够经碰撞合成反应获得.还分析了H 4,H 6的生成机制.

A STUDY ON H+, H+2/H,H2 REACTION IN PENNING ION TRAP

Steady H+ n(n=3,4,5,6)ion is produced by H+, H+ 2/H, H 2 collision reaction in a Penning ion trap. Except for H+, H+ 2, H+ 3 and H+ 5, H+ 4 and H+ 6 are detected in the ion spectrum of high difference ratio. Wright and Borkman predicted that H+ 4,6 have the comparable binding energy with the corresponding H+ 5,7. Our experimental results provide strong evidence to their prediction. It can be concluded from the experimental results that H+ 4,6 and the corresponding H+ 5,7 have the similar character in the aspect of reaction dynamics and they can be obtained by the collision compound reaction. The mechanism of the collision compound reaction H+ 4 and H+ 6 is also analysed.