Measurement of Stark broadening of Mn I and Mn II spectral lines in plasmas used for Laser-Induced Breakdown Spectroscopy

Bredice, F.; Borges, Felipe Azevedo; Sobral, H.; Villagrán-Munı́z, M.; Rocco, H. O. Di; Cristoforetti, G.; Legnaioli, Stefano; Palleschi, Vincenzo; Salvetti, A.; Tognoni, E.

doi:10.1016/j.sab.2007.10.014

Cited by 39 publications

(23 citation statements)

References 29 publications

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“…1 in [51] the authors show three lines of Mn II a 5 S-z 5 P O multiplet (uv 5) with experimental ratio S 2 /S 1 =1.59 and S 3 /S 1 = 2.23 (index 1 denotes weakest line and so on) what compares well with theoretical ratios 1.62 and 2.19. This is good indication for optically thin profiles.…”

Section: Self-absorptionsupporting

confidence: 79%

Spectroscopic diagnostics of laser-induced plasmas

Konjević

Ivković

Jovičević

2010

Spectrochimica Acta Part B: Atomic Spectroscopy

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Section: Self-absorptionsupporting

confidence: 79%

Spectroscopic diagnostics of laser-induced plasmas

Konjević

Ivković

Jovičević

2010

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…The first experimental measurements were reported by Djeniže et al (2006) for 11 spectral lines using a low-pressure arc as the plasma source at 49 000 K. The results showed Stark width values of the resonance lines much higher than the aforementioned calculations. Bredice et al (2007) measured the same lines using a laser-induced plasma and obtained similar results although their plasma temperature was only 10 000 K. In 2008, Popović et al recalculated the Stark widths and shifts performing more sophisticated calculations for the intense lines of the multiplets a 7 S-z 7 P o and a 5 S-z 5 P o by means of the semiclassical perturbation theory. This work achieved a better agreement with the former experiment but large differences were still present for some of the lines.…”

Section: Introductionmentioning

confidence: 90%

Experimental Stark widths and shifts of Mn iispectral lines

Manrique

Aragón

Aguilera

2018

Monthly Notices of the Royal Astronomical Society

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Stark widths and shifts of Mn II lines with wavelengths in the range 2300-3500 Å have been measured by laser-induced breakdown spectroscopy. The use of fused glass samples with varying Mn concentrations has allowed minimization of the error due to self-absorption in the Stark width measurements, which has made it possible to include resonance lines in the study. The laser-induced plasmas are characterized along their temporal evolution, showing electron densities in the range (0.60-6.75) × 10 17 cm −3 and temperatures in the range 11 000-13 900 K. The results are compared with experimental and theoretical values available in the literature.

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“…For obtaining a better understanding of the advantages of an approach with respect to the others, we decided to work on synthetic LIBS spectra, simulated using a software developed by the authors [20]. The software is able to reproduce a number of complex experimental plasma (multi-elemental, inhomogeneous, subject to self-absorption and with temperature and electron number density gradients) but, for the present application, the LIBS spectra of a simple binary alloy (Cu-Ni) were simulated, assuming a homogeneous plasma at a given constant temperature and electron number density, with negligible self-absorption effects.…”

Section: -Experimental Approachmentioning

confidence: 99%

A hybrid calibration-free/artificial neural networks approach to the quantitative analysis of LIBS spectra

et al. 2015

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A 'hybrid' method is proposed for the quantitative analysis of materials by LIBS, combining the precision of the calibration-free LIBS (CF-LIBS) algorithm with the quickness of artificial neural networks. The method allows the precise determination of the samples' composition even in the presence of relatively large laser fluctuations and matrix effects. To show the strength and robustness of this approach, a number of synthetic LIBS spectra of Cu-Ni binary alloys with different composition were computer-simulated, in correspondence of different plasma temperatures, electron number densities and ablated mass. The CFLIBS/ANN approach here proposed demonstrated to be capable, after appropriate training, of 'learning' the basic physical relations between the experimentally measured line intensities and the plasma parameters. Because of that the composition of the sample can be correctly determined, as in CF-LIBS measurements, but in a much shorter time

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Measurement of Stark broadening of Mn I and Mn II spectral lines in plasmas used for Laser-Induced Breakdown Spectroscopy

Cited by 39 publications

References 29 publications

Spectroscopic diagnostics of laser-induced plasmas

Spectroscopic diagnostics of laser-induced plasmas

Experimental Stark widths and shifts of Mn iispectral lines

A hybrid calibration-free/artificial neural networks approach to the quantitative analysis of LIBS spectra

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