Dyke, P.Pollack, S.E.Hulet, R.G.2015-03-302015-03-302013Dyke, P., Pollack, S.E. and Hulet, R.G.. "Finite-range corrections near a Feshbach resonance and their role in the Efimov effect." <i>Physical Review A,</i> 88, no. 2 (2013) American Physical Society: 23625. http://dx.doi.org/10.1103/PhysRevA.88.023625.https://hdl.handle.net/1911/79430We have measured the binding energy of 7Li Feshbach molecules deep into the nonuniversal regime by associating atoms in a Bose-Einstein condensate with a modulated magnetic field. We extract the scattering length from these measurements, correcting for nonuniversal short-range effects using the field-dependent effective range. With this more precise determination of the Feshbach resonance parameters we reanalyze our previous data on the location of atom loss features produced by the Efimov effect [Pollack et al., Science 326, 1683 (2009)]. We find the measured locations of the three- and four-body Efimov features to be consistent with universal theory at the 20%-30% level.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1103/PhysRevA.88.023625