Abstract
Using crossed beams of alkali atoms (Li, Na, K) and state-selected metastable Ne(3s 3 P 2,3 P 0) atoms, we have measured the energy spectra of electrons resulting in the respective Penning ionization processes at thermal collision energies. The spectra are very different for Ne(3 P 2) and Ne(3 P 0): those for Ne(3 P 2) are broad due to a strongly attractive interaction potential with a well depth of 798 (30) meV (Li), 672(20) meV (Na), and 561(20) meV (K), those for Ne(3 P 0) are narrow and compatible with van der Waals type attraction (well depth <50 meV). The Ne(3 P 2) cross section exceeds the one for Ne(3 P 0) by about an order of magnitude.
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Lorenzen, J., Hotop, H. & Ruf, M.W. The interaction of metastable Ne(3s 3 P 2,3 P 0) atoms with alkali atoms. Z Phys D - Atoms, Molecules and Clusters 1, 261–268 (1986). https://doi.org/10.1007/BF01436681
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DOI: https://doi.org/10.1007/BF01436681