Characteristics of highly excited diatomic rovibrational spectra and slow atomic collisions

Details Characteristics of highly excited diatomic rovibrational spectra and slow atomic collisions Characteristics of highly excited diatomic rovibrational spectra and slow atomic collisions

2000-05-25

arxiv.org/abs/physics/0005071v1

Physics

Atomic Physics

Scientific paper

We show that the highly excited rovibrational spectra of a diatomic molecule and the closely related slow atomic collision processes contain more systematics and require less parameters to characterize than the Rydberg spectrum of an atom. In the case of a single channel, for example, we show that a single short-range parameter gives a complete description of slow collisions for practically all angular momenta, and covers an energy range of hundreds of millikelvins. The same parameter also describes the highly excited rovibrational spectra in the threshold region, including states of different angular momenta. Sample applications and predictions of the theory are discussed, including comparisons with experiment.

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