IONIZING COLLISIONS OF LASER-EXCITED RARE GAS ATOMS

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Abstract
Using mass spectrometry and electron spectrometry, we have studied ionization of Ar and Kr atoms in thermal energy collisions with laser-excited short-lived Ne(2p5 3p J=1,2,3) atoms. The cross sections show a strong state-dependence, which is reproduced in calculations based on theoretical potential energy curves and a single exponential autoionization width. Significant polarization effects have been observed in the total and partial ion yields and in the electron spectra ; they can only be explained with Ω-dependent autoionization probabilities favouring σ → σ electron transfer

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