DeSalvo, B.J.Aman, J.A.Dunning, F.B.Killian, T.C.Sadeghpour, H.R.Yoshida, S.Burgdörfer, J.2016-06-232016-06-232015DeSalvo, B.J., Aman, J.A., Dunning, F.B., et al.. "Ultra-long-range Rydberg molecules in a divalent atomic system." <i>Physical Review A,</i> 92, no. 3 (2015) American Physical Society: 031403(R). http://dx.doi.org/10.1103/PhysRevA.92.031403.https://hdl.handle.net/1911/90548We report the creation of ultra-long-range Sr2 molecules comprising one ground-state 5s2 1S0 atom and one atom in a 5sns 3S1 Rydberg state for n ranging from 29 to 36. Molecules are created in a trapped ultracold atomic gas using two-photon excitation near resonant with the 5s5p 3P1 intermediate state, and their formation is detected through ground-state atom loss from the trap. The observed molecular binding energies are reproduced with the aid of first-order perturbation theory that utilizes a Fermi pseudopotential with effective s-wave and p-wave scattering lengths to describe the interaction between an excited Rydberg electron and a ground-state Sr atom.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.92.031403