Measurement of Stark widths and shifts of Ca ii spectral lines

Measurement of Stark widths and shifts of Ca ii spectral lines

Stark widths and shifts of Ca ii lines have been measured by laser-induced breakdown spectroscopy. Laser-induced plasmas are generated from fused glass samples with different calcium concentrations, selected to control self-absorption. The spectra are measured at different instants of the plasma evo...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2014-10, Vol.444 (2), p.1854-1858
Hauptverfasser: Aguilera, J. A., Aragón, C., Manrique, J.
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Electrons
Measurement
Plasma physics
Spectrum analysis
Temperature
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Zusammenfassung:Stark widths and shifts of Ca ii lines have been measured by laser-induced breakdown spectroscopy. Laser-induced plasmas are generated from fused glass samples with different calcium concentrations, selected to control self-absorption. The spectra are measured at different instants of the plasma evolution from 0.6 to 3.4 μs, at which the temperature and electron density are in the ranges 11 700–15 600 K and (0.84–6.9) × 1017 cm−3, respectively. The results are compared with experimental and theoretical data available in the literature.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stu1556