EFFECTS OF THE 3-BODY FORCE IN 3-NUCLEON SYSTEMS

The effects of the three-body force are investigated in the three-nucl eon systems. The three-body Faddeev equation is completely solved with a phenomenological three-body force which can reproduce the triton bi nding energy. The adopted two-body force is the PEST potential (or the Ernst-Shakin-Thaler's separable expansion of the Paris potential) up to J = 2. Calculated results of the differential cross section, and th e values of the doublet and the quartet n-d scattering lengths, agree very well with the experimental data. The calculated three-body-force effects on the N-d scattering observables A(y), iT11, T20, T21, T22 ar e also discussed together with the Doleschall-type Coulomb correction.