中文摘要：

用脉冲直流放电产生Ar原子亚稳态3p54s[3／2]2和3p54s′[1／2]0在单光予32500-35600cm-1能量范围内，结合飞行时间质谱技术获得Ar原子共振增强激发光谱．光谱分析表明，所有谱线来源于Ar原子3p54s[3／2]2SD3p54s′[1／2]0两个亚稳态吸收单个光子向偶宇称np′、nf′自电离Rydberg态序列的跃迁．实验观测到许多新的自电离能级，并获得更精确和系统的能级位置和量子亏损值数据．

英文摘要：

Metastable 40Ar＊ atoms are produced in the two metastable states 3p54s [3/2]2 and 3p5 4s′ [1/2]0 in a pulsed DC discharge in a beam, and are subsequently excited to the even-parity autoionizing resonance series 3pSnp′[3/2]1,2, 3p5 np′ [1/2]1, and 3p5nf′[5/2]3 using single photon excitation with a pulsed dye laser. The excitation spectra of the even-parity autoion- izing resonance series from the metastable 40Ar＊ are obtained by recording the autoionized Ar＋ ions with time-of-flight ion detection in the photon energy range of 32500-35600 cm-1 with an experimental bandwidth of 〈0.1 cm-1. A wealth of autoionizing resonances are newly observed, from which more precise and systematic spectroscopic data of the level energies and quantum defects are derived.