Evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements
This paper is part o f a more general study aimed to the determination o f the best experimental procedures for reliable quantitative measurements o f F e-M n alloys by LIBS. In this work, attention is pointed on the self-absorption processes, whose effect deeply influences the LIBS measurements, re...
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2006
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/55773 http://digital.cic.gba.gob.ar/handle/11746/372 |
| Aporte de: |
| id |
I19-R120-10915-55773 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ingeniería laser-induced breakdown spectroscopy espectroscopia de plasma inducido por láser Aleaciones fe-mn alloys self-absorption |
| spellingShingle |
Ingeniería laser-induced breakdown spectroscopy espectroscopia de plasma inducido por láser Aleaciones fe-mn alloys self-absorption Bredice, Fausto Osvaldo Borges, F. O. Sobral, Hugo Martín Villagrán, Mayo Di Rocco, Héctor O. Cristoforetti, G. Legnaioli, S. Palleschi, V. Pardini, L. Salvetti, A. Tognoni, E. Evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements |
| topic_facet |
Ingeniería laser-induced breakdown spectroscopy espectroscopia de plasma inducido por láser Aleaciones fe-mn alloys self-absorption |
| description |
This paper is part o f a more general study aimed to the determination o f the best experimental procedures for reliable quantitative measurements o f F e-M n alloys by LIBS. In this work, attention is pointed on the self-absorption processes, whose effect deeply influences the LIBS measurements, reflecting in non-linear calibration curves. The effect o f self-absorption on the line intensity can be quantified by defining a self absorption coefficient, that measures the deviation o f the line intensity from the linear extrapolation o f the curve o f growth in the optically thin regime. The authors demonstrated in a previous paper that self absorption coefficients could be calculated once the electron density o f the plasma is known and the Stark coefficients o f the lines are available. However, when the Stark coefficients o f the lines o f interest are not known, a different approach is needed. In this work a new method for evaluation o f self absorption coefficients in LIBS measurements is presented, which does not require the knowledge o f Stark coefficients. In order to understand the basic principles and setting out the theoretical tools that w ill be used for the analysis o f the alloys, a preliminary study was done on pure Mn; LIBS spectra were acquired in different experimental conditions, at different laser energies and different delays after the laser irradiation o f the sample. Moreover, collinear double pulse measurements were also performed. Analytical relations were derived and experimental procedures devised for evaluation o f the self absorption coefficients o f several Mn lines, which are important for characterization and control o f the experimental conditions in which the analysis is performed. |
| format |
Articulo Articulo |
| author |
Bredice, Fausto Osvaldo Borges, F. O. Sobral, Hugo Martín Villagrán, Mayo Di Rocco, Héctor O. Cristoforetti, G. Legnaioli, S. Palleschi, V. Pardini, L. Salvetti, A. Tognoni, E. |
| author_facet |
Bredice, Fausto Osvaldo Borges, F. O. Sobral, Hugo Martín Villagrán, Mayo Di Rocco, Héctor O. Cristoforetti, G. Legnaioli, S. Palleschi, V. Pardini, L. Salvetti, A. Tognoni, E. |
| author_sort |
Bredice, Fausto Osvaldo |
| title |
Evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements |
| title_short |
Evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements |
| title_full |
Evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements |
| title_fullStr |
Evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements |
| title_full_unstemmed |
Evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements |
| title_sort |
evaluation of self-absorption of manganese emission lines in laser induced breakdown spectroscopy measurements |
| publishDate |
2006 |
| url |
http://sedici.unlp.edu.ar/handle/10915/55773 http://digital.cic.gba.gob.ar/handle/11746/372 |
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Repositorios |
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