Abstract
Collisions of laser-excited Na(3p) and stepwise laser-excited Na(3d) atoms in a single effusive atomic beam have been observed to result in Na 2 + ion formation: Na(3p)+Na(3d)→Na 2 ++e −. The cross-section for this process is measured to be approximately 15 times larger than the familiar Na(3p)+Na(3p)→Na 2 ++e − associative ionization reaction, at relative collision velocities of approximately 300 m/s. Theoretical models discussed here are qualitatively consistent with the experimental results.
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