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Resonant and Off-resonance ionization of laser-excited sodium vapor

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

Electrons produced in a sodium effusive beam irradiated by pulsed laser light have been energy-analyzed. For resonant excitation of the atoms to the 3p state, we have studied associative ionization of excited Na(3p) (AI), Penning ionization (PI) and photoionization of highly-excited Na(n l),n l=3d, 4p, 5s, 4d/4f, by measurements of electron energy spectra. Our interpretation of the spectra is supported by a numerical analysis of the data which leads to estimates of the cross sections compatible with values previously measured in other experiments.

Off-resonance ionization is considered at a particular wavelength. It is presumed to involve laser-excited dimers Na **2 . Spectra show that highly-excited atoms are produced by photodissociation of Na **2 or from Na **2 -Na collisional energy transfer, and that these atoms support the dominant off-resonance ionization channel in our laser excitation conditions.

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Authors and Affiliations

  1. Service de Physique des Atomes et des Surfaces, CEA, CEN Saclay, Gif-sur-Yvette, France

    B. Carré, F. Roussel & G. Spiess

  2. Laboratoire de Spectroscopie Atomique et Ionique and LURE, CNRS, Université Paris-Sud, Orsay, France

    J. M. Bizau, P. Gérard & F. Wuilleumier

Authors
  1. B. Carré
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  2. F. Roussel
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  3. G. Spiess
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  4. J. M. Bizau
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  5. P. Gérard
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  6. F. Wuilleumier
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Carré, B., Roussel, F., Spiess, G. et al. Resonant and Off-resonance ionization of laser-excited sodium vapor. Z Phys D - Atoms, Molecules and Clusters 1, 79–90 (1986). https://doi.org/10.1007/BF01384662

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  • DOI: https://doi.org/10.1007/BF01384662

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