Spectra of the WVIII isoelectronic sequence: III. ReIX

Rhenium spectra excited in vacuum spark sources of different setups and electric circuits were recorded on two high resolution vacuum spectrographs: a 10 m normal incidence spectrograph with a 36001 mm super(-1) grating in the Meudon Observatory and a 3 m grazing incidence spectrograph with a 36001...

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Bibliographic Details
Published in:Physica scripta 2015-09, Vol.90 (9), p.1-14
Main Authors: Ryabtsev, A N, Kononov, E Ya, Kildiyarova, R R, Tchang-Brillet, W-U L, Wyart, J-F, Champion, N, Blaess, C
Format: Article
Language:English
Subjects:
Diffraction gratings
Excitation
Excitation spectra
Fine structure
Gratings (spectra)
Isoelectronic sequence
Spectra
Spectrographs
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Summary:Rhenium spectra excited in vacuum spark sources of different setups and electric circuits were recorded on two high resolution vacuum spectrographs: a 10 m normal incidence spectrograph with a 36001 mm super(-1) grating in the Meudon Observatory and a 3 m grazing incidence spectrograph with a 36001 mm super(-1) grating in the Institute of Spectroscopy in Troitsk. A total of 112 lines in the region 146-244 [Angstrom] were identified as transitions from the interacting excited even configurations 4f super(12)5s super(2)5p super(6)5d + 4f super(13)5s super(2)5p super(5)(5d + 6s) + 4f super(14)5s super(2)5p super(4)(5d + 6s) to the low-lying odd configurations 4f super(13)5s super(2)5p super(6) and 4f super(14)5s super(2)5p super(5). A change of the ground configuration from 4f super(13)5s super(2)5p super(6) to 4f super(14)5s super(2)5p super(5) in a comparison with the previous spectra of the isoelectronic sequence HfVI-W VIII was observed. Fine structure splittings and relative positions of the odd terms were established, and 83 levels of the excited even configurations were found.
ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/90/9/095401