Radiative lifetime measurements of highly excited even-parity levels of Eu i

Authors

  • Wei Zhang,

    1. College of Physics, Jilin University; and Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Changchun 130012, China
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  • Shan Du,

    1. College of Physics, Jilin University; and Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Changchun 130012, China
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  • Yanyan Feng,

    1. College of Physics, Jilin University; and Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Changchun 130012, China
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  • Liyun Jiang,

    1. College of Physics, Jilin University; and Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Changchun 130012, China
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  • Zhankui Jiang,

    1. College of Physics, Jilin University; and Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Changchun 130012, China
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  • Zhenwen Dai

    Corresponding author
    1. College of Physics, Jilin University; and Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Changchun 130012, China
    2. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
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E-mail: dai@jlu.edu.cn

ABSTRACT

Natural radiative lifetime measurements have been performed for 186 even-parity highly excited levels of neutral europium in the energy range from 27852.90 to 45106.83 cm−1 using a time-resolved laser-induced fluorescence technique in a laser-produced plasma. This work is the largest-scale laboratory study to date of Eu i radiative lifetimes using modern methods. The lifetime values measured in this paper are in the range from 17.0 to 3569 ns. Comparison with previous data reveals a good level of agreement. Unique J-values of the 43438.19- and 43637.11-cm−1 levels have been assigned. The present work will be useful for extending the set of oscillator strengths available for Eu i.

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