Abstract
Rare Earth Elements are important for stellar atmosphere analysis but the corresponding Stark broadening data are scarce. For Yb III and Lu IV theoretical as well as experimental data on Stark broadening parameters of spectral lines are absent in the literature. Using the modified semiempirical method of Dimitrijević and Konjević, we determined Stark widths for four Yb III and four Lu IV transitions, belonging to the erbium isoelectronic sequence. The obtained results are also used to discuss similarities between homologous transitions in the erbium isoelectronic sequence. We note as well that calculated widths will be implemented in the STARK-B database which is also a part of the Virtual Atomic and Molecular Data Center.
Highlights
The development and use of space observations with satellite-born instruments increased the importance of trace elements for investigation of stellar spectra
For Yb III and Lu IV theoretical as well as experimental data on Stark broadening parameters of spectral lines are absent in the literature
Such data are useful for analysis, synthesis and research of high resolution spectra obtained from space born instruments, they are very useful for laboratory plasma diagnostics as well as for investigation of various plasmas in laser physics, fusion research and for plasma-based technologies
Summary
The development and use of space observations with satellite-born instruments increased the importance of trace elements for investigation of stellar spectra. For Yb III and Lu IV theoretical as well as experimental data on Stark broadening parameters of spectral lines are absent in the literature.
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