Abstract
Experimental study of atomic vapors resonantly excited by a laser is facilitated for alkali metals and alkaline earths because the transition to the first excited state lies in the visible range. Observation of a high fractional ionization, close to 100%, in dense alkaline vapors after a short time (≈ 1 μs) and under modest laser illumination (≈ 1 MW/cm2) had become a challenge since the pioneer experiments of LUCATORTO and McILRATH [1,2]. During the last decade, studies of ionization processes taking place in the laser-excited medium have rapidly expanded [3–10]. More recently, electron spectrometry has proved to be a remarkable means of investigation offering a decisive insight into the ionization mechanisms in a Na vapor [11–13]. The many experimental data accumulated by several groups [14– 17] has made Na a model and a starting point to develop a better understanding of the intricate situation in Ba vapor studied in the present work.
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Cubaynes, D. et al. (1987). Collisional Ionization in Laser-Excited Barium Vapor. In: Rahman, N.K., Guidotti, C., Allegrini, M. (eds) Photons and Continuum States of Atoms and Molecules. Springer Proceedings in Physics, vol 16. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-71778-9_26
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DOI: https://doi.org/10.1007/978-3-642-71778-9_26
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