Photoassociative Spectroscopy of Ultracold, Metastable Argon

We will present results from our study of photoassociative spectroscopy of metastable argon atoms confined in a magneto-optical trap. Spectra have been obtained, as a function of probe intensity, in a region up to 10 GHz red detuned from the trapping transition. Preliminary analysis of the spectra has been done using the near-dissociation LeRoy-Bernstein method. We will also discuss extension of the work to other metastable, noble gas atoms.