Memorias de investigación
Artículos en revistas:
Measurement of Laser-Induced Plasma: Stark Broadening Parameters of Pb (II) 2203.5 and 4386.5 Å Spectral Lines
Año:2019
Áreas de investigación
  • Física química y matemáticas
Datos
Descripción
In this work, the Stark broadening parameters (widths and shifts) of the 2203.5 A? and 4386.5 A? Pb(II) spectral lines have been investigated and measured in laser-induced breakdown spectroscopy (LIBS), using a lead sample (99.999% purity). A Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) laser operating at its fundamental wavelength (10 640 A? ), generating pulses of 290 mJ, 7 ns of duration, and a repeat frequency of 20 Hz, has been used for the ablation of said lead sample in vacuum and in a controlled argon atmosphere. A study to understand the expansion dynamics of the lead produced plasma was performed. The spectra have been obtained and measured at different time delays of the plasma evolution in the range of 0.15?9 ls, at which the temperature and electron number density are in the ranges of 28 200? 8000 K and 1.3 1017 to 3 1015 cm3 , respectively. A graphical representation of the evolution of temperature and electron number density versus 0.3 to 6.5 ls delay from the laser pulse is presented. The important effect of the different environment where the plasma expands has been pointed out. Local thermodynamic equilibrium conditions have been checked. The obtained results of the Stark widths and shifts at the different temperatures and densities of electrons have been compared with the limited data available in the literature. This study aims to obtain more accurate values for these parameters and also to establish regularities and similarities for said parameters.
Internacional
Si
JCR del ISI
Si
Título de la revista
Applied Spectroscopy
ISSN
0003-7028
Factor de impacto JCR
1,642
Información de impacto
Datos JCR del año 2017
Volumen
73
DOI
10.1177/0003702818816305
Número de revista
2
Desde la página
133
Hasta la página
151
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Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada