Preprint Article Version 1 This version is not peer-reviewed

Self-Absorption Analysis of Silver Resonance Lines in Nano-Material Laser Produced Plasma

Version 1 : Received: 18 July 2018 / Approved: 20 July 2018 / Online: 20 July 2018 (05:49:30 CEST)

How to cite: El Sherbini, A.M.; Hagras , M.A.; Rizk , M.R.; El Badawy, E.A.; Parigger, C.G. Self-Absorption Analysis of Silver Resonance Lines in Nano-Material Laser Produced Plasma. Preprints 2018, 2018070376 (doi: 10.20944/preprints201807.0376.v1). El Sherbini, A.M.; Hagras , M.A.; Rizk , M.R.; El Badawy, E.A.; Parigger, C.G. Self-Absorption Analysis of Silver Resonance Lines in Nano-Material Laser Produced Plasma. Preprints 2018, 2018070376 (doi: 10.20944/preprints201807.0376.v1).

Abstract

The resonance spectra of neutral silver indicate self-absorption for the studied Ag I lines at the wavelengths of 327.9 nm and 338.2 nm. The center dip is associated with self-reversal due to self-absorption in the plasma. The Q-switched radiation of 355 nm, 532 nm, or 1064 nm from a Nd:YAG laser device generates the plasma at the surface of silver nano-material targets, with experiments conducted in standard ambient temperature and pressure laboratory air. Procedures for recovery of the spectral line shapes confirm that over and above the effects of self-reversal, line shape distortion are important in the analysis. The work discusses parameters describing self-absorption when using fluence levels of 2 to 33 J/cm2 to generate the plasma. Furthermore, subsidiary calibration efforts that utilize the hydrogen alpha line of the Balmer series show that the Ag I lines at 827.35 nm and 768.7 nm are optically thin.

Subject Areas

laser-induced plasma; atomic spectroscopy; self-absorption; nanoparticles; silver; hydrogen

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