【摘要】 <正> 二元以至多元原子簇（包括铝氧原子簇）的产生与研究是当前十分活跃的领域.最近,我们在自制的装置上,以功率密度达10⁸W·cm^-2的脉冲激光束（波长532nm）在10₄^-Pa 的真空中溅射AlN 样品时,在实验记录的正负离子质谱中出现的几乎都是铝原子簇离子;而当我们选择α-Al₂O₃为样品时,则观察到了一系列质量分布很广的二元铝氧原子簇负离子,如图1所示.图1的飞行时间质谱是连续100次记录的数据叠加的结果,图中各Al_nO_m^-分别以（n,m）更多还原

【Abstract】 Aluminum oxide cluster anions with very broad mass range was produced on ahome-made apparatus by laser ablation of α-Al₂O₂ in high vacuum.The recordedmass spectrum showes that,as n>5,only the series of the cluster anions with com-ponents of normal oxidation states were observed.Among the series of cluster anions,the anions foming a complete or near complete hexagonal close-packing structuralunit have relative higher signal intensities.更多还原