Abstract
The lifetimes of Na 3 excited states in the gas phase have been measured by a time delay two-photon ionization technique followed by mass-selective detection. The lifetimes of the excited states A, B, B′ and C are 60, 14, 7 and 7 ns respectively. Radiative relaxation is shown to be the main relaxation process for the A, B and B′ states. The radiative lifetimes are interpreted by a very simple model.
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