Measurement of laser-induced plasma: Stark broadening parameters of Pb(II) 2203.5 and 4386.5 Å spectral lines

Alonso Medina, Aurelia (2019). Measurement of laser-induced plasma: Stark broadening parameters of Pb(II) 2203.5 and 4386.5 Å spectral lines. "Applied Spectroscopy", v. 73 (n. 2); pp. 133-151. ISSN 0003-7028. https://doi.org/10.1177/0003702818816305.

Description

Title: Measurement of laser-induced plasma: Stark broadening parameters of Pb(II) 2203.5 and 4386.5 Å spectral lines
Author/s:
  • Alonso Medina, Aurelia
Item Type: Article
Título de Revista/Publicación: Applied Spectroscopy
Date: 31 January 2019
ISSN: 0003-7028
Volume: 73
Subjects:
Freetext Keywords: Laser-induced plasma; LIP; Plasma expansion; Stark broadening parameters; Atomic emission spectroscopy
Faculty: E.T.S.I. Diseño Industrial (UPM)
Department: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this work, the Stark broadening parameters (widths and shifts) of the 2203.5 Å and 4386.5 Å 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 Å), 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 µs, at which the temperature and electron number density are in the ranges of 28 200– 8000 K and 1.3 x 10¹⁷ to 3 x 10¹⁵ cm-³, respectively. A graphical representation of the evolution of temperature and electron number density versus 0.3 to 6.5 µs 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.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT2015-63974-C4-2-RUnspecifiedUnspecifiedTratamiento mediante LSP de aleaciones de magnesio biodegradables y bioreabsorbibles como método de mejora de sus propiedades mecánicas

More information

Item ID: 55667
DC Identifier: http://oa.upm.es/55667/
OAI Identifier: oai:oa.upm.es:55667
DOI: 10.1177/0003702818816305
Official URL: https://journals.sagepub.com/doi/abs/10.1177/0003702818816305?journalCode=aspc
Deposited by: Memoria Investigacion
Deposited on: 03 Jul 2019 09:57
Last Modified: 31 Jan 2020 23:30
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