Fraunhofer-type absorption line splitting and polarization in confocal double-pulse laser induced plasma

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Abstract

Strong line splitting and polarization are observed in Fraunhofer-type absorption lines in Pb, Sn, Si, Cd, In, and Zn in confocal double-pulse laser induced plasma (DP-LIP) experiments. This effect is detectable using medium laser power densities: (∼1-2) × 1013 W/m2 for the first laser pulse and 1 × 1014 W/m2 for the second laser pulse. Polarization and splitting effects exist only during the second laser pulse (∼7 ns). Absorption line polarization and splitting phenomena may be explained by a high overall magnetic field and motional Stark effect caused by the second laser pulse inside the laser plasma created by the first pulse.

Original languageEnglish
Pages (from-to)127-135
Number of pages9
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume88
DOIs
StatePublished - 1 Oct 2013
Externally publishedYes

Keywords

  • Fraunhofer lines
  • Laser-induced breakdown spectroscopy
  • Polarization
  • Splitting

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