High resolution photoassociation spectroscopy of the excited c3 + 1 potential of 23Na133Cs Picard, Lewis R. B. González Férez, María Rosario We report on photoassociation spectroscopy probing the c 3 Σ + 1 potential of the bialkali NaCs molecule, identifying 11 vibrational lines between v ′ = 0 and v ′ = 25 of the excited c 3 Σ + 1 potential and fitting their rotational and hyperfine structure. The observed lines are assigned by fitting to an effective Hamiltonian model of the excited-state structure with rotational and hyperfine constants as free parameters. We discuss unexpected broadening of select vibrational lines and its possible link to strong spin-orbit coupling of the c 3 Σ + 1 potential with the nearby b 3 Π 1 and B 1 Π 1 manifolds. Finally, we report use of the v ′ = 22 line as an intermediate state for two-photon transfer of weakly bound Feshbach molecules to the rovibrational ground state of the X 1 Σ + manifold. 2023-07-25T11:00:00Z 2023-07-25T11:00:00Z 2023-06-05 info:eu-repo/semantics/article Lewis R. B. Picard, Jessie T. Zhang, William B. Cairncross, Kenneth Wang, Gabriel E. Patenotte, Annie J. Park, Yichao Yu, Lee R. Liu, Jonathan D. Hood, Rosario González-Férez, and Kang-Kuen Ni Phys. Rev. Research 5, 023149[DOI:https://doi.org/10.1103/PhysRevResearch.5.023149] https://hdl.handle.net/10481/83977 eng http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional American Physical Society