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25 April 2024

» pubmed » pmid15783485

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Precise determination of 6Li cold collision parameters by radio-frequency spectroscopy on weakly bound molecules
M Bartenstein ; A Altmeyer ; S Riedl ; R Geursen ; S Jochim ; C Chin ; J Hecker Denschlag ; R Grimm ; A Simoni ; E Tiesinga ; C J Williams ; P S Julienne ;
Date:	18 Mar 2005
Journal:	Phys Rev Lett, 94 (10), 103201
Abstract:	We employ radio-frequency spectroscopy on weakly bound (6)Li(2) molecules to precisely determine the molecular binding energies and the energy splittings between molecular states for different magnetic fields. These measurements allow us to extract the interaction parameters of ultracold (6)Li atoms based on a multichannel quantum scattering model. We determine the singlet and triplet scattering lengths to be a(s) = 45.167(8)a(0) and a(t) = -2140(18)a(0) (1a(0) = 0.052 917 7 nm), and the positions of the broad Feshbach resonances in the energetically lowest three s-wave scattering channels to be 83.41(15), 69.04(5), and 81.12(10) mT.
Source:	PubMed, pmid15783485
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