Significant underbinding for the triton of a quantum-chromodynamically motivated realistic NN potential containing a superdeep short-ranged attraction and a forbidden state in the S waves has been reported from a previous Faddeev calculation. In the present paper, this feature is reproduced with a simple S-wave-interaction model of this NN potential, generalized into a wide range in the form of a short distance node, and explained in terms of short-ranged NN D-wave components which the nodal S-wave components introduce inevitably through the three-body kinematics. The strengths of the NN D-wave interactions are estimated to be not sufficient to compensate for the kinetic energies arising from these D-wave components, which means a significant loss for 3N binding. This is in sharp contrast to the strong 3α binding in the forbidden state αα potential model which is supported by strong D- and G-wave interactions. The present study indicates that a noticeable short distance node in the 2N wave function is unlikely.

• Received 25 November 1985

DOI:https://doi.org/10.1103/PhysRevC.34.303