A Spectroscopic study of laser-induced Tin-Lead plasma: transition probabilities for spectral lines of Sn I

Alonso Medina, Aurelia (2010). A Spectroscopic study of laser-induced Tin-Lead plasma: transition probabilities for spectral lines of Sn I. "Spectrochimica Acta Part B: Atomic Spectroscopy", v. 65 (n. 2); pp. 158-166. ISSN 0584-8547. https://doi.org/10.1016/j.sab.2010.01.002.

Description

Title: A Spectroscopic study of laser-induced Tin-Lead plasma: transition probabilities for spectral lines of Sn I
Author/s:
  • Alonso Medina, Aurelia
Item Type: Article
Título de Revista/Publicación: Spectrochimica Acta Part B: Atomic Spectroscopy
Date: February 2010
ISSN: 0584-8547
Volume: 65
Subjects:
Freetext Keywords: Laser-induced plasma spectroscopy; Plasma diagnostic; Transition probabilities; Tin
Faculty: E.U.I.T. Industrial (UPM)
Department: Física Aplicada [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this paper, we present transition probabilities for 97 spectral lines of Sn I, corresponding to transitions n(n = 6,7,8)s → 5p2, n(n = 5,6,7)d → 5p2, 5p3 → 5p2, n(n = 7)p → 6s, determined by measuring the intensities of the emission lines of a Laser-induced breakdown (emission) spectrometry (LIBS). The optical emission spectroscopy from a laser-induced plasma generated by a 10 640 Å radiation, with an irradiance of 1.4 × 1010 Wcm− 2 on an Sn–Pb alloy (an Sn content of approximately 20%), in vacuum, was recorded at 0.8 µs, and analysed between 1900 and 7000 Å. The population-level distribution and corresponding temperature were obtained using Boltzmann plots. The electron density of the plasma was determined using well-known Stark broadening parameters of spectral lines. The plasma under study had an electron temperature of 13,200 K and an electron number density of 2 × 1016 cm− 3. The experimental relative transition probabilities were put on an absolute scale using the branching ratio method to calculate Sn I multiplet transition probabilities from available radiative lifetime data of their upper states and plotting the Sn I emission spectrum lines on a Boltzmann plot assuming local thermodynamic equilibrium (LTE) to be valid and following Boltzmann's law. The LTE conditions and plasma homogeneity have been checked. Special attention was paid to the possible self-absorption of the different transitions. The experimental results obtained have been compared with the experimental values given by other authors.

More information

Item ID: 7062
DC Identifier: http://oa.upm.es/7062/
OAI Identifier: oai:oa.upm.es:7062
DOI: 10.1016/j.sab.2010.01.002
Official URL: http://www.sciencedirect.com/science/article/pii/S0584854710000030
Deposited by: Memoria Investigacion
Deposited on: 26 May 2011 08:15
Last Modified: 15 Feb 2017 08:06
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