ISSN:
1434-6079
Keywords:
PACS. 33.20.Kf Visible spectra- 32.80.Pj Optical cooling of atoms; trapping- 34.50.Pi State-to-state scattering analyses
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: A simple model is developed to determine a scattering length from the experimental values of the energy of the last, least bound, vibrational levels of the ground state, either or ,of an alkali dimer. It is based on an extrapolation of the positions of the few outermost nodes of the bound vibrational wave functions towards the dissociation threshold. It uses the asymptotic part of the molecular potential only. The method is applied to recently measured levels at the asymptote (3s+3s) of Na2. We obtain precise values for the two scattering lengths respectively associated to the dissociation limits F 1 =F 2 =1,F=2 (55.1 1.6 a0) and F 1 =F 2 =1,F=0 (50.0 1.6 a0); the first value corresponds to the a1,-1 scattering length usually considered in cold collisions. The extrapolation procedure is also applied to Li2, using existing experimental data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100500050336
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