Abstract
Vibrational levels a few μeV below the dissociation asymptote 3s + 3p of Na2 were studied in a molecular beam. The hyperfine structure could be resolved. The molecular levels can be described by adiabatic potentials calculated with the help of atomic parameters: spin-orbit parameter, hyperfine parameter and lifetime of the 3p level. This gives a very precise picture of long oange interactions up to internuclear distances R ≈ 250 A. Retardation effects were not identified within the error limits of the data in agreement with theoretical estimates. The life-time derived for the 3p level of the sodium atom agrees very well with independent measurements from different methods.
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More From: Zeitschrift für Physik D Atoms, Molecules and Clusters
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