Ba原子6s2 1S0 - 6s6p3P1跃迁Hanle效应实验研究

J4 ›› 2012, Vol. 29 ›› Issue (3): 257-264.

• 光谱 • 下一篇

Ba原子6s² ¹S₀ - 6s6p³P₁跃迁Hanle效应实验研究

余庚华^1,2,3, 仲嘉琪^1,2,3, 王谨^1,2, 詹明生^1,2

1中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室，湖北武汉 430071；
2中国科学院原子频标重点实验室，湖北武汉 430071；
3中国科学院研究生院，北京 100049

收稿日期:2011-04-11 修回日期:2011-05-18 出版日期:2012-05-28 发布日期:2012-05-22
通讯作者: 詹明生湖北人，研究员，主要从事冷原子、量子信息及量子调控方面的研究。 E-mail:mszhan@wipm.ac.cn
作者简介:余庚华湖北人，博士生，研究方向为原子分子物理。E-mail：genhuayu@wipm.ac.cn
基金资助:
国家自然科学基金项目（10827404）和国家基础研究发展规划课题（2005CB724501）

Hanle Effect of 6s^{2 1}S₀- 6s6p³P₁ transition of barium atom

YU Geng-hua^1,2,3, ZHONG Jia-qi^1,2,3, WANG Jin^1,2, ZHAN Ming-sheng^1,2

1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China；
2 Key Laboratory of Atomic Frequency Standards, Chinese Academy of Sciences, Wuhan 430071, China；
3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received:2011-04-11 Revised:2011-05-18 Published:2012-05-28 Online:2012-05-22

摘要/Abstract

摘要：

Ba原子是光频标的候选者之一，对其进行有效的激光冷却与囚禁需要相关能级的寿命和跃迁几率的信息。Ba原子激发态6s6p 3P1能级在激光冷却实验中很重要，通过Hanle效应实验测量了这一能级的寿命和自发辐射率，从理论和实验上研究了探测激光有限线宽和光强对Ba原子基态6s2 1S0与激发态6s6p 3P1之间跃迁（波长791 nm）的Hanle效应的荧光信号的影响。在考虑了激光线宽和光强因素后所得到的激发态6s6p 3P1的能级寿命和自发辐射率与其他方法给出的结果很好符合。

关键词: 光谱学, 能级寿命, Hanle效应, 线宽, Ba原子, 原子频标

Abstract:

Barium atom is one of candidates for optical atomic clock. Laser cooling and trapping the atom needs sufficient spectroscopic information of relevant energy levels. The excited energy level 6s6p 3P1 is very important in the experiment of laser cooling and trapping barium atoms. Hanle effect was examined both theoretically and experimentally for the 6s2 1S0 to 6s6p3P1 transition at 791nm. A theoretical model was developed to include the influence of linewidth and intensity of probe laser on the fluorescence of Hanle effect. By fitting the experimental measurement with the model, lifetime and transition probabilities of 6s6p3P1 state to lower states were obtained and found to be in good agreement with other reports.

Key words: spectroscopy, lifetime, Hanle effect, linewidth, Ba atoms, optical atomic clock

中图分类号:

余庚华仲嘉琪王谨詹明生. Ba原子6s² ¹S₀ - 6s6p³P₁跃迁Hanle效应实验研究[J]. J4, 2012, 29(3): 257-264.

YU Geng-hua, ZHONG Jia-qi, WANG Jin, ZHAN Ming-sheng. Hanle Effect of 6s^{2 1}S₀- 6s6p³P₁ transition of barium atom[J]. J4, 2012, 29(3): 257-264.

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Ba原子6s² ¹S₀ - 6s6p³P₁跃迁Hanle效应实验研究

Hanle Effect of 6s^{2 1}S₀- 6s6p³P₁ transition of barium atom

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