Collision spectroscopy with aligned and oriented atoms |
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Authors: | T Royer D Dowek J C Houver J Pommier N Andersen |
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Institution: | 1. L.C.A.M., Bat. 351, Université Paris-Sud, F-91405, Orsay Cedex, France 2. Physics Laboratory, H.C. ?rsted Institute, DK-2100, Copenhagen, Denmark
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Abstract: | Electron capture processes in the H+?Na(3s) and H+?Na(3p) collisions are experimentally investigated in the 0.3–3 keV energy range using a crossed beam experiment. The excited Na(3p) target is produced with a well-defined alignment using laser pumping. The time of flight technique enables the identification of all the H(n)+Na+ channels populated in the collision. Total cross section ratios σ3p (n=2)/σ3s (n=2),σ3p (n=3)/σ3s (n=2) and σ3s (n=3)/σ3s (n=2) for the production of H(n=2) and H(n=3) are measured in the H+?Na (3s) and H+?Na (3p) collisions. They reveal a strong dominance of the production of H(n=2) in the H+?Na(3p) collision, especially for energies below 1 keV. |
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