ELECTRON ANGULAR-DISTRIBUTION IN ABOVE-THRESHOLD 2-PHOTON DETACHMENT OF H-

We present angular-differential above-threshold two-photon detachment rates of H- below the second ionization threshold. They have been calc ulated using an L-2 close-coupling method with a B-spline basis. We ha ve found that in the non-resonant region the angular distribution of p hotoelectrons is close to that obtained from a pure D partial wave. Th is is also the case in the vicinity of the lowest D-1(e)(1, 0) doubly excited state. In contrast, the angular distribution in the vicinity o f the S-1(e)(1, 0) doubly excited states is the result of a complicate d interference pattern between S and D waves. In the latter case, know ledge of the corresponding phase shifts is essential to interpret the actual results.