The bound state Faddeev equations in the well-known simplified form for separable two-nucleon forces are extended to include a three-nucleon force. A numerical study for the two-pion-exchange three-nucleon force in conjunction with commonly used spin dependent $s$-wave $\mathrm{NN}$ forces is presented. The violent short-range behavior of the two-pion-exchange three-nucleon force requires the choice of form factors for the two-nucleon forces which have a repulsion built in.

NUCLEAR STRUCTURE Triton calculation, interplay of two- and three-nucleon force.

• Received 29 November 1982

DOI:https://doi.org/10.1103/PhysRevC.28.1807