PHOTOASSOCIATIVE SPECTROSCOPY OF 1(G)-STATE, 0(U)(-STATE AND 0(G)(-)-STATE OF NA-2())

We use photoassociation of ultracold Na to study transitions from free atoms to bound molecules. We obtain rovibrational spectra of the 1(g) , the 0(u)(+), and, for the first time, the 0(g)(-) ''purely long-rang e'' state of Na-2, all of which dissociate to Na(3 S-2(1/2))+Na(S P-2( 3/2)).