铈原子偶宇称自电离态激光共振电离光谱  

Laser Resonance Ionization Spectroscopy of Even-Parity Autoionization States of Cerium Atom

作　　者：李志明[1] 朱凤蓉[1] 张子斌[1] 任向军[1] 邓虎[1] 翟利华[1] 张利兴[1] 

机构地区：[1]西北核技术研究所,激光共振电离质谱实验室,陕西西安710613

出　　处：《光谱学与光谱分析》2004年第12期1494-1498,共5页Spectroscopy and Spectral Analysis

摘　　要：给出了利用三色三光子激光共振电离光谱技术研究铈原子偶宇称自电离态的结果。2 7个有较大跃迁截面高奇宇称激发态被用作第二激发态。第三台染料激光波长在 6 34～ 6 70nm范围内扫描 ,发现了 14 1个偶宇称自电离态能级。为了寻求最佳电离方案 ,对有较大自电离态能级跃迁截面的各电离路径进行了初步的判定 ,推荐了 8条较佳的电离路径。This paper describes the investigation of even-parity autoionization states of cerium atoms by three-step three-color resonance ionization spectroscopy (RIS). Twenty-seven odd-parity highly excited levels, whose transition probability is high, were used in this research. One hundred and forty-one autoionization states were found by these channels with the third-step laser scanning in the wavelength range of 634-670 nm. The ionization probabilities of different channels, which had higher cross sections, were compared. On the basis of this, eight optimal photoionization schemes of cerium atom have been given.

关 键 词：自电离态 电离光谱 原子 激光共振 激发态 能级跃迁 截面 光波长 染料激光 扫描 

分 类 号：O562[理学—原子与分子物理] O561.3[理学—物理]