中国物理B ›› 2015, Vol. 24 ›› Issue (8): 83203-083203.doi: 10.1088/1674-1056/24/8/083203

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Branching ratios of autoionization from Eu 4f76p1/26d [J] autoionizing states

闫俊刚a b, 沈礼a b, 梁洪瑞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:2015-01-04 修回日期:2015-03-03 出版日期:2015-08-05 发布日期:2015-08-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11174218).

Branching ratios of autoionization from Eu 4f76p1/26d [J] autoionizing states

Yan Jun-Gang (闫俊刚)a b, Shen Li (沈礼)a b, Liang Hong-Rui (梁洪瑞)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:2015-01-04 Revised:2015-03-03 Online:2015-08-05 Published:2015-08-05
  • Contact: Dai Chang-Jian E-mail:daicj@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11174218).

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摘要： The autoionization branching ratios from Eu 4f76p1/26d [J] autoionizing states to its 4f76s+ (9So), 4f76s+ (7So), and 4f75d+ (9Do) final ionic states are investigated with the combination of the three-step laser excitation and the velocity-map imaging technique. These different autoionizing states are excited via 4f76s6d 8DJ [J = 5/2, 7/2, and 9/2] intermediate states, respectively. The experimental photoelectron images are obtained, from which energy distributions of ejected electrons are achieved with the mathematical transformation. Furthermore, the energy dependence of the branching ratio is investigated within the autoionization resonance, by which population inversion is observed as an important characteristic. The J-dependence is also studied systematically. The validity of the well-known isolated core excitation technique used for obtaining the autoionization spectrum is also studied.

关键词: Eu atom, velocity-map imaging, autoionizing state, autoionization branching ratio

Abstract: The autoionization branching ratios from Eu 4f76p1/26d [J] autoionizing states to its 4f76s+ (9So), 4f76s+ (7So), and 4f75d+ (9Do) final ionic states are investigated with the combination of the three-step laser excitation and the velocity-map imaging technique. These different autoionizing states are excited via 4f76s6d 8DJ [J = 5/2, 7/2, and 9/2] intermediate states, respectively. The experimental photoelectron images are obtained, from which energy distributions of ejected electrons are achieved with the mathematical transformation. Furthermore, the energy dependence of the branching ratio is investigated within the autoionization resonance, by which population inversion is observed as an important characteristic. The J-dependence is also studied systematically. The validity of the well-known isolated core excitation technique used for obtaining the autoionization spectrum is also studied.

Key words: Eu atom, velocity-map imaging, autoionizing state, autoionization branching ratio

中图分类号:  (Autoionization)

  • 32.80.Zb
32.30.-r (Atomic spectra?) 32.80.Ee (Rydberg states)