Study on Elementary Reaction Processes of Ions

研制了具有放电流动离子源的团簇离子束装置，研究了ArN_2与简单脂肪族碳氢化合物Kr和CO_2的离子-分子反应。发现团簇离子具有不同于自由离子的特征反应性。该装置成功地用于研究了CO_2、CF_3与简单脂肪烃及苯衍生物等芳香族化合物的离子-分子反应，考察了团簇离子的形成过程。例如，我们发现在CO_2^/CH_4，CF_3^/C_2H_2，CF_3^/PHX(X=C_2H，CN，OCH_3，COH，COCH_3，CoOCH_3)反应中产生团簇离子：如：CF_3^C_2H_2*CF_3C_2H_2^。从Kr的Ar余辉反应和Xe的Kr余辉反应中观察到了新的ArKr^和KrXe^发射，并确定了它们的电子结构。在较高的稀有气体滞留压下，发现了稀有气体杂三聚体离子如HARE_2的新的束缚-自由跃迁。这些发射有望在真空紫外区用作新的准分子激光器。

The cluster-ion-beam apparatus with a discharge-flow ion source was developed and ion-molecule reactions of ArN_2^+ with simple aliphatic hydrocarbons, Kr, and CO_2 were studied. A characteristic reactivity of cluster ions, which is different from that of free ions, was found. This apparatus was succussfully applied to the study of ion-molecule reactions of CO_2^+ and CF_3^+ with simple aliphatic hydrocarbons and such aromatic compounds as benzene derivatives, and the formation processes of cluster ions were examined. For example, we found that cluster ions were produced in the CO_2^+/CH_4, CF_3^+/C_2H_2, CF_3^+/PhX(X=C_2H,CN,OCH_3, COH,COCH_3, COOCH_3)reactions : e.g.,CF_3^++C_2H_2*CF_3C_2H_2^+ (1)A systematic optical study on rare gas heterocluster ions was also performed using a highpressure discharge-flow apparatus. New ArKr^+ and KrXe^+ emissions were observed from the Ar afterglow reaction of Kr and Kr afterglow reaction of Xe, and their electronic structures wered etermined. At higher rare gas stagnation pressures, new bound-free transitions of rare gas heterotrimer ions such as HeAr_2^+ were found. These emissions are expected to be useful as new excimer lasers in the vacuum ultraviolet region.