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Abstract. The D(ff, p)D elastic scattering was investigated especially in theCoulomb sensitive scattering regions. Angular distributions of the differential cross section and of the analyzing power Ay, with emphasis on small scattering angles, were measured at 10.0 and 14.1 MeV. For extreme backward angles up to ~.m. = 179~ the differential cross section was measured at 12o0, 14.1 and 16.5 MeV. The data have been compared with recent Faddeev calculations based on the realistic meson-exchange Paris potential and including an approximate Coulomb correction. There are discrepancies between the data and the calculations especially for the analyzing power. This indicates that the approximate treatment of Coulomb effects and possibly also the purely rmclear part of the calculations need to be improved.

Differential cross section and analyzing power of the breakup reaction~H(p, pp)n have been measured in a kinematically complete coincidence experiment for two selected kinematical configurations, the final state interaction and the collinear configuration with the neutron at rest in the c.m. system. Faddeev calculations done with a code by Stuivenberg and in particular with a recent code by Doleschall show good agreement with the data. Even in the collinear case which is assumed to be most sensitive to effects of the three-body force, no influence of three-body forces is observed. Their contribution therefore cannot exceed the experimental error of 2 -3%. The results indicate that contributions from I' and D waves as well as the tensor force are more important than effects from a three-body force.

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