Collision spectroscopy with aligned and oriented atoms |
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Authors: | D Dowek J C Houver C Richter 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: | Neutralisation processes in 0.15–1.5 keV collisions of H? with Na atoms in the 3s ground state or in the excited 3p state have been investigated by means of time-of-flight analysis of the neutral H atoms produced. The H? - Na(3p) system, investigated here for the first time, is particularly interesting since the entrance channel is embedded in the H - Na(3s)] +e ? continuum, enabling Penning detachment to occur. The measured relative neutralisation cross section ratios σ(3p)/σ(3s) decrease from 3 to 1.6 with increasing energy. Based on earlier published results for σ(3s), σ(3p) total cross sections exceeding 100 Å2 are estimated. |
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