铕原子双色三光子共振电离光谱的研究  

Investigation of Europium Atom by Two-Color Three-Photon Resonant Ionization Spectroscopy

作　　者：谢军[1] 戴长建[1] 李鸣[1] 

机构地区：[1]天津理工大学理学院,天津300384

出　　处：《光学学报》2010年第7期2142-2148,共7页Acta Optica Sinica

基　　金：国家自然科学基金(10574098;10674102);天津市自然科学基金(05YFJMJC05200)资助课题

摘　　要：利用双色三光子共振电离光谱技术,对处于42896~44854 cm-1能域内的铕（Eu）原子奇宇称高激发态的光谱特性进行了研究,报道了该能域内93个高激发态的光谱信息。一方面,采用了三种不同的激发路径,不仅测量了这些高激发态的能级位置,还给出了它们的光电离信号的相对强度;另一方面,结合电偶极跃迁的选择定则,对所得光谱数据进行了细致地分析和比较,唯一确定了各原子态的总角动量J。通过与相关文献资料进行对比,不仅确认了许多高激发态的研究结果,还发现了25个新的奇宇称高激发态。此外,还对文献中的少数高激发态的光谱归属进行了修正,并唯一地确定了这些高激发态的J值。The spectral properties of odd-parity highly excited states of europium Eu atom have been investigated with the technique of two-color three-photon resonant ionization spectroscopy in the energy region of 42896～44854 cm-1.The spectral information of 93 highly excited states of europium atom has been reported in this energy region.On the one hand,three different excitation pathways are used,not only the energy values of these states have been measured,but also the relative strengths of their photoionization signals are given.On the other hand,according to the selection rules of the electric dipole transition,the total angular momentum quantum numbers J of these states have been uniquely determined by analyzing and comparing the spectral data obtained in the experiment.Comparisons with the published literatures,25 new odd-parity highly excited states of europium atom have been discovered,which lie in the region of the present investigation,except for confirming some of the states reported in the literatures.In addition,the spectral information of several highly excited states from the literatures has been amended,and the J values of these states also have been assigned uniquely.

关 键 词：原子与分子物理学 奇宇称高激发态光谱 多步共振激发 铕原子 

分 类 号：O433[机械工程—光学工程]