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Investigating the influence of spatial confinement on self-absorption effects in laser-induced breakdown spectroscopy.

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Title: Investigating the influence of spatial confinement on self-absorption effects in laser-induced breakdown spectroscopy.
Authors: Zhan, WeiJie1 (AUTHOR), Liao, Ping1 (AUTHOR), Tang, Yun1 (AUTHOR) yuntang@hnust.edu.cn, Dou, Zhiyuan1 (AUTHOR), Zhan, Jie1 (AUTHOR)
Source: JAAS (Journal of Analytical Atomic Spectrometry). Mar2026, Vol. 41 Issue 3, p1091-1098. 8p.
Subjects: Laser-induced breakdown spectroscopy, Spectral lines, Quantitative research, Radiation trapping, Plasma diagnostics, Plasma physics
Abstract: This study investigates a spatial confinement approach utilizing cylindrical cavities to mitigate plasma self-absorption effects in laser-induced breakdown spectroscopy (LIBS)—a critical limitation for quantitative analysis. Experiments systematically evaluate atomic lines (Al I 396.15 nm, Cu I 521.83 nm, and Mg I 517.27 nm) and an ionic line (Mg II 293.65 nm) of the 6061 Al alloy, T2 Cu, and AZ31B Mg alloy. Results demonstrate that confinement reduces self-absorption through three mechanisms: restricting plasma expansion, elevating the electron temperature, and reducing the ground-state particle density. Optimal reduction occurs at a cavity height of h = 12 mm and a radius of r = 8 mm. Specifically, ionic lines (e.g., Mg II 293.65 nm, ionization energy = 8.65 eV) exhibit significantly stronger reduction than atomic lines under identical conditions, which is attributed to their higher ionization energies and narrower spectral widths. This differential response originates from the reduced ground-state particle density and complex transition pathways in ionic species. The technique effectively minimizes spectral line attenuation and broadening, thereby providing physical insights into the confinement-mediated mitigation of self-absorption and offering a potential strategy for improving quantitative LIBS analysis. [ABSTRACT FROM AUTHOR]
Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192223570
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Investigating the influence of spatial confinement on self-absorption effects in laser-induced breakdown spectroscopy.
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  Data: <searchLink fieldCode="AR" term="%22Zhan%2C+WeiJie%22">Zhan, WeiJie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liao%2C+Ping%22">Liao, Ping</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tang%2C+Yun%22">Tang, Yun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yuntang@hnust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Dou%2C+Zhiyuan%22">Dou, Zhiyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhan%2C+Jie%22">Zhan, Jie</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22JAAS+%28Journal+of+Analytical+Atomic+Spectrometry%29%22">JAAS (Journal of Analytical Atomic Spectrometry)</searchLink>. Mar2026, Vol. 41 Issue 3, p1091-1098. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Laser-induced+breakdown+spectroscopy%22">Laser-induced breakdown spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Spectral+lines%22">Spectral lines</searchLink><br /><searchLink fieldCode="DE" term="%22Quantitative+research%22">Quantitative research</searchLink><br /><searchLink fieldCode="DE" term="%22Radiation+trapping%22">Radiation trapping</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+diagnostics%22">Plasma diagnostics</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+physics%22">Plasma physics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study investigates a spatial confinement approach utilizing cylindrical cavities to mitigate plasma self-absorption effects in laser-induced breakdown spectroscopy (LIBS)—a critical limitation for quantitative analysis. Experiments systematically evaluate atomic lines (Al I 396.15 nm, Cu I 521.83 nm, and Mg I 517.27 nm) and an ionic line (Mg II 293.65 nm) of the 6061 Al alloy, T2 Cu, and AZ31B Mg alloy. Results demonstrate that confinement reduces self-absorption through three mechanisms: restricting plasma expansion, elevating the electron temperature, and reducing the ground-state particle density. Optimal reduction occurs at a cavity height of h = 12 mm and a radius of r = 8 mm. Specifically, ionic lines (e.g., Mg II 293.65 nm, ionization energy = 8.65 eV) exhibit significantly stronger reduction than atomic lines under identical conditions, which is attributed to their higher ionization energies and narrower spectral widths. This differential response originates from the reduced ground-state particle density and complex transition pathways in ionic species. The technique effectively minimizes spectral line attenuation and broadening, thereby providing physical insights into the confinement-mediated mitigation of self-absorption and offering a potential strategy for improving quantitative LIBS analysis. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1039/d5ja00453e
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      – Code: eng
        Text: English
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        PageCount: 8
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      – SubjectFull: Laser-induced breakdown spectroscopy
        Type: general
      – SubjectFull: Spectral lines
        Type: general
      – SubjectFull: Quantitative research
        Type: general
      – SubjectFull: Radiation trapping
        Type: general
      – SubjectFull: Plasma diagnostics
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      – SubjectFull: Plasma physics
        Type: general
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      – TitleFull: Investigating the influence of spatial confinement on self-absorption effects in laser-induced breakdown spectroscopy.
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            NameFull: Zhan, WeiJie
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            NameFull: Liao, Ping
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            NameFull: Tang, Yun
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            NameFull: Dou, Zhiyuan
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            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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              Value: 41
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