Observation of the long-range potential well of the (6)1Σg+(3s+5s) state of Na2 T. Laue, P. Pellegrini, O. Dulieu, C. Samuelis, H. Knöckel, F. Masnou-Seeuws and E. Tiemann Eur. Phys. J. D, 26 2 (2003) 173-185 Published online: 22 July 2003 DOI: 10.1140/epjd/e2003-00221-7