Physical Review A
We present results of photoassociative spectroscopy performed on ultracold metastable argonatoms in a magneto-optical trap. Ion spectra are obtained with laser detuning up to a few gigahertz below the 4s[3/2]2 → 4p[5/2]3 trapping transition at 811 nm and with intensities in a range of ~(102-105)ISat. We also compute dipole-dipole potentials for both singly and doubly excited diatomic molecules and use a Leroy-Bernstein analysis to determine the approximate vibrational spacings in the (s+p) and (p+p) manifolds. Based on this theoretical framework, we explain a broad background feature in our data and suggest that double-excitation mechanisms are likely responsible for sharp dips in the ion signal.
Original Publication Citation
Shaffer, M. K., Ranjit, G., Sukenik, C. I., & Walhout, M. (2011). Photoassociative spectroscopy of ultracold metastable argon. Physical Review A, 83(5), 052516. doi: 10.1103/PhysRevA.83.052516
Shaffer, M. K.; Ranjit, G.; Sukenik, C. I.; and Walhout, M., "Photoassociative Spectroscopy of Ultracold Metastable Argon" (2011). Physics Faculty Publications. 1.