Measurements of radiative lifetimes, branching fractions, transition probabilities, and oscillator strengths for Eu II and Eu III levels

Abstract Radiative lifetimes of 11 levels of Eu II in the energy range 34 923.43–46 029.14 cm−1 and those of six levels in the 4f65d configuration of Eu III in the range from 39 636.88 to 42 530.91 cm−1 were measured by time-resolved laser-induced fluorescence spectroscopy in laser-induced plasma. T...

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Bibliographic Details
Published inMonthly notices of the Royal Astronomical Society Vol. 485; no. 4; pp. 4485 - 4491
Main Authors Tian, Yanshan, Wang, Xinghao, Liu, Chunqing, Yu, Qi, Dai, Zhenwen
Format Journal Article
LanguageEnglish
Published Oxford University Press 01.06.2019
Subjects
atomic processes
methods: laboratory
radiative transition
instrumentation: spectrographs
atomic data
techniques spectroscopic
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Summary:Abstract Radiative lifetimes of 11 levels of Eu II in the energy range 34 923.43–46 029.14 cm−1 and those of six levels in the 4f65d configuration of Eu III in the range from 39 636.88 to 42 530.91 cm−1 were measured by time-resolved laser-induced fluorescence spectroscopy in laser-induced plasma. The obtained lifetimes range from 33 to 760 ns. To our knowledge, six levels for Eu II and three levels for Eu III are reported for the first time. Transition probabilities and oscillator strengths for 24 lines of Eu II and five lines of Eu III relative to the studied levels were derived by combining the obtained lifetimes with branching fractions measured in the emission spectrum of a hollow cathode lamp.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stz562