We report on the high resolution photoassociation spectroscopy of a
87Rb spin-1 Bose-Einstein condensate to the
1g(P3∕2) v=152 excited molecular states. We demonstrate the use of spin dependent photoassociation to experimentally identify the molecular states and their corresponding initial scattering channel. These identifications are in excellent agreement with the eigenvalues of a hyperfine-rotational Hamiltonian. Using the observed spectra we estimate the change in scattering length and identify photoassociation laser light frequency ranges that maximize the change in the spin-dependent mean-field interaction energy.
We report the high-resolution photoassociation (PA) spectroscopy of a
87Rb Bose-Einstein condensate (BEC) to excited molecular states near the dissociation limit of
5P1/2+5S1/2 by optical Bragg scattering. Since the detection of optical Bragg scattering in the BEC has a high signal-noise ratio, we obtain the high-resolution PA spectrum of excited molecular states in the range of $\ifmmode\pm\else\textpm\fi{}1$ GHz near the dissociation limit of
5P1/2+5S1/2. We compare the results with the conventional method of trap loss and show that the results agree with each other very well. Many interesting phenomena of excited molecular states are observed, such as light-induced frequency shift and anomalous strong bound molecular lines at the atomic transition from $|F=1\ensuremath{\rangle}$ to $|{F}^{\ensuremath{'}}=2\ensuremath{\rangle}$. The observed excited molecular states in the range of $\ifmmode\pm\else\textpm\fi{}1$ GHz near the dissociation limit of
5P1/2+5S1/2 should help to further improve long-range bound-state models near the dissociation limit.