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Angular-momentum-insensitive quantum-defect theory for diatomic systems

Bo Gao
Phys. Rev. A 64, 010701(R) – Published 12 June 2001
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Abstract

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, e.g., 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 presented, including comparisons with experiment.

  • Received 21 August 2000

DOI:https://doi.org/10.1103/PhysRevA.64.010701

©2001 American Physical Society

Authors & Affiliations

Bo Gao

  • Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606
  • Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

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Vol. 64, Iss. 1 — July 2001

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