Influence of higher-order dispersion coefficients on near-threshold bound and continuum states: Application to {sup 88}Sr{sub 2}
- Technische Universitaet Muenchen, D-85747 Garching (Germany)
We give a simple description of quantum states near the dissociation threshold of deep interatomic potentials. The influence of the potential tail is separated from effects due to the interaction at short distances. We present a general formalism which is valid for weakly bound and low-energy continuum states, both for vanishing and non-vanishing angular momentum. Its applicability is demonstrated for the example of the electronic ground state of the strontium dimer {sup 88}Sr{sub 2}. With an appropriate choice of the potential tail that includes higher-order dispersion coefficients, all short-range effects are incorporated via the threshold quantum number v{sub D} and one further parameter accounting for residual short-range effects.
- OSTI ID:
- 22038784
- Journal Information:
- Journal of Chemical Physics, Vol. 135, Issue 21; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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