Penning离子阱中H^+,H_2^+/H,H_2反应的研究  

A STUDY ON H^+,H_2^+/H, H_2 REACTION IN PENNING ION TRAP

作　　者：汪华英[1] 李新[1] 刘琴[1] 张明明[1] 李兰秀[1] 

机构地区：[1]北京师范大学物理学系,北京100875

出　　处：《北京师范大学学报（自然科学版）》2004年第5期629-633,共5页Journal of Beijing Normal University(Natural Science)

摘　　要：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 .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.

关 键 词：H2^+ 离子阱 碰撞反应 团簇离子 离子谱 结合能 偶数 奇数 实验结果 性质 

分 类 号：N941[自然科学总论—系统科学] O562[理学—原子与分子物理]