Observatorio de I+D+i UPM

Descripción
Data on Stark widths of spectral lines are of high interest for astrophysics and analytical techniques of stellar plasma diagnosis. Stark widths of 43 spectral lines of Sn I and 27 spectral lines of Sn II has been measured in a laser-induced plasma (LIP) at an electron temperature of 11,000 K and an electron density of 1.1 × 1016 cm−3. The LIP optical emission spectroscopy generated by a 10640 Å radiation, with a flux of 1.4 × 1010 W cm−2 on several tin and lead targets in an atmosphere of argon was recorded at 2.5 μs and analyzed between 1890 and 7000 Å. The population level distribution and the corresponding temperatures were obtained using Boltzmann plots. The plasma electron densities were determined using well-known Stark broadening parameters of spectral lines. Special attention was dedicated to the possible self-absorption of the different transitions. The local thermodynamic equilibrium (LTE) conditions and plasma homogeneity have been checked. The experimental results obtained have been compared with the experimental and theoretical values given by other authors. The results obtained in this study will allow a substantial improvement in the interpretation of the data of the ultraviolet spectrum of the tin observed by the Goddard High Resolution Spectrograph aboard the Hubble Space Telescope. These atomic data are relevant to the analysis of the isotopic abundances of tin in stellar atmospheres.
Internacional	Si
JCR del ISI	Si
Título de la revista	ASTROPHYSICAL JOURNAL
ISSN	0004-637X
Factor de impacto JCR	6,405
Información de impacto
Volumen	672
DOI	10.1086/523844
Número de revista	2
Desde la página	1286
Hasta la página	1291
Mes	ENERO
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• Autor: Cristobal Colon Hernandez (UPM)
• Autor: Aurelia Alonso Medina (UPM)

• Creador: Grupo de Investigación: Caracterización óptica de materiales
• Departamento: Física Aplicada