Determination of opportunities for detecting chemical elements in aqueous aerosol in filament-induced emission spectroscopy

The opportunities of the filament - induced emission spectroscopy method for analysis of elemental composition of aqueous aerosols in the atmosphere are estimated. Emission lines of chemical elements were excited by filamentation of femtosecond laser pulses (60 fs, 800 nm, 4.4 mJ) in the weak focus mode with the lens with 500 mm focal length in the aqueous aerosol. The limits of detection of aluminum, barium, and sodium in the aqueous aerosol are obtained.

[1]  See Leang Chin,et al.  The critical laser intensity of self-guided light filaments in air , 2000 .

[2]  Maria Cristina Facchini,et al.  Combined determination of the chemical composition and of health effects of secondary organic aerosols: the POLYSOA project. , 2008, Journal of aerosol medicine and pulmonary drug delivery.

[3]  Redstone Arsenal,et al.  Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas , 2001 .

[4]  G. Roy,et al.  Long range trace detection in aqueous aerosol using remote filament-induced breakdown spectroscopy , 2007 .

[5]  S. S. Golik,et al.  Determination of detection limits for elements in water by femtosecond laser-induced breakdown spectroscopy , 2012 .

[6]  See Leang Chin,et al.  Focusing limits of intense ultrafast laser pulses in a high pressure gas: road to new spectroscopic source , 2000 .

[7]  See Leang Chin,et al.  Plasma density inside a femtosecond laser filament in air: strong dependence on external focusing. , 2006, Physical review. E, Statistical, nonlinear, and soft matter physics.

[8]  K. Yamada,et al.  Chemical composition of oceanic aerosol , 1972 .

[9]  Y. Kulchin,et al.  Broadening and shift of emission lines in a plasma of filaments generated by a tightly focused femtosecond laser pulse in air , 2018 .

[10]  V. P. Kandidov,et al.  Filamentation “remote” sensing of chemical and biological agents/pollutants using only one femtosecond laser source , 2009 .

[11]  G. Mourou,et al.  Self-channeling of high-peak-power femtosecond laser pulses in air. , 1995, Optics letters.

[12]  See Leang Chin,et al.  Competition between multiphoton/tunnel ionization and filamentation induced by powerful femtosecond laser pulses in air , 2003 .