中国物理B ›› 2015, Vol. 24 ›› Issue (11): 113201-113201.doi: 10.1088/1674-1056/24/11/113201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Field ionization process of Eu 4f76snp Rydberg states

张婧a b, 沈礼a b, 戴长建a b   

  1. a Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin 300384, China;
    b School of Science, Tianjin University of Technology, Tianjin 300384, China
  • 收稿日期:2015-03-26 修回日期:2015-06-02 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: Dai Chang-Jian E-mail:daicj@126.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11004151 and 11174218).

Field ionization process of Eu 4f76snp Rydberg states

Zhang Jing (张婧)a b, Shen Li (沈礼)a b, Dai Chang-Jian (戴长建)a b   

  1. a Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin 300384, China;
    b School of Science, Tianjin University of Technology, Tianjin 300384, China
  • Received:2015-03-26 Revised:2015-06-02 Online:2015-11-05 Published:2015-11-05
  • Contact: Dai Chang-Jian E-mail:daicj@126.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11004151 and 11174218).

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摘要：

The field ionization process of the Eu 4f76snp Rydberg states, converging to the first ionization limit, 4f76s 9S4, is systematically investigated. The spectra of the Eu 4f76snp Rydberg states are populated with three-step laser excitation, and detected by electric field ionization (EFI) method. Two different kinds of the EFI pulses are applied after laser excitation to observe the possible impacts on the EFI process. The exact EFI ionization thresholds for the 4f76snp Rydberg states can be determined by observing the corresponding EFI spectra. In particular, some structures above the EFI threshold are found in the EFI spectra, which may be interpreted as the effect from black body radiation (BBR). Finally, the scaling law of the EFI threshold for the Eu 4f76snp Rydberg states with the effective quantum number is built.

关键词: Eu atom, Rydberg state, field ionization, ionization threshold

Abstract:

The field ionization process of the Eu 4f76snp Rydberg states, converging to the first ionization limit, 4f76s 9S4, is systematically investigated. The spectra of the Eu 4f76snp Rydberg states are populated with three-step laser excitation, and detected by electric field ionization (EFI) method. Two different kinds of the EFI pulses are applied after laser excitation to observe the possible impacts on the EFI process. The exact EFI ionization thresholds for the 4f76snp Rydberg states can be determined by observing the corresponding EFI spectra. In particular, some structures above the EFI threshold are found in the EFI spectra, which may be interpreted as the effect from black body radiation (BBR). Finally, the scaling law of the EFI threshold for the Eu 4f76snp Rydberg states with the effective quantum number is built.

Key words: Eu atom, Rydberg state, field ionization, ionization threshold

中图分类号:  (Visible and ultraviolet spectra)

  • 32.30.Jc
32.80.Ee (Rydberg states) 32.60.+i (Zeeman and Stark effects)