Initial spatial distribution of localized electrons under laser ionization of athracene in methylcyclohexane determined by the picosecond photo-assisted charge separation technique

F. F. Brazgun; Victor A. Nadtochenko; Igor V. Rubtsov; L. V. Lukin

doi:10.1117/12.242176

10 June 1996 Initial spatial distribution of localized electrons under laser ionization of athracene in methylcyclohexane determined by the picosecond photo-assisted charge separation technique

F. F. Brazgun, Victor A. Nadtochenko, Igor V. Rubtsov, L. V. Lukin

Author Affiliations +

Proceedings Volume 2802, Laser Chemistry, Biophysics, and Biomedicine; (1996) https://doi.org/10.1117/12.242176
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

The electron-ion pair recombination dynamics in solution of anthracene in methylcyclohexane was investigated by the picosecond photoassisted charge separation technique. The ion pairs was created by the two-photon ionization of anthracene using the 360 and 720 nm laser pulses. The delayed I.R. (1080 nm) pulse excited electrons after the U.V. pulse. The enhancement of photogenerated charge, (Delta) Q, due to additional action of the I.R. laser pulse was measured as a function of the delay time, t_d, between the U.V. and I.R. pulses. Decay kinetics (Delta) Q(t_d) observed was in agreement with the diffusion model of geminate recombination in which the initial spatial distribution of the electron-ion pair has Gaussian form f₀(r) exp(-r²/B²) with B equals 3.5 +/- 0.5 and B equals 5.5 +/- 0.5 nm for the wavelength of U.V. light 360 and 270 nm respectively.

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F. F. Brazgun, Victor A. Nadtochenko, Igor V. Rubtsov, and L. V. Lukin "Initial spatial distribution of localized electrons under laser ionization of athracene in methylcyclohexane determined by the picosecond photo-assisted charge separation technique", Proc. SPIE 2802, Laser Chemistry, Biophysics, and Biomedicine, (10 June 1996); https://doi.org/10.1117/12.242176

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