COLLISIONAL EXCITATION OF H-** RESONANCES AROUND H(n=3D3) =46. Penent, J.P. Grouard, D.Modeley, J.L. Montmagnon and L.Sarkadi# Laboratoire de Dynamique des Ions, Atomes et Mol=E9cules, Universit=E9 Paris= 6, =46rance # ATOMKI, Debrecen, Hungary H-/rare gas collisions can be an efficient way to produce H-** doubly excited states. These autodetaching states give discrete electron energy spectra. We have observed the decay of H-**(n=3D3) Feshbach resonances to H(1s) and H(n=3D2) + e- showing strong interference patterns. We also looked for the possible presence of shape resonances above H(n=3D3). With the present statistics only a cusp due to the H(n=3D3) dipole interacting with the outgoing electron is clearly observed.