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摘要: 用激光三步共振激发方法观察了Eu原子的自电离谱。测定了Eu原子偶宇称,能量在45740.3—47341.0cm-1范围的75个能级位置,识别了收敛于Eull 4f76s 7S3的4f76s(7S)np(n=12—46)的自电离里德伯系列。报道了这一系列在此能量范围的能级位置及量子亏损数据。
Abstract: The autoionization spectra of Eu have been observed by using three-step laser excitation method. Seventy five energy levels of Eu which are located in the 45740.3-47341.0cm-1 energy interval with even parity have been measured. The 4f76s(7S)np (n=12-46) 6PJ autoionization Rydberg series converging to the 7S3 level of the configuration 4f76s in Eu II have been identified. The energy levels and quantum defects for this series in above energy interval are reported.