An exact method to obtain the wave function of the neutron-deuteron system at energies below the breakup threshold is presented. The scattering length and the effective range are calculated in the case of three local potentials. The quantity $k cot\delta$ as a function of energy is given for one of these interactions. As for the triton case, realistic potentials are unable to cope completely with experimental data.

NUCLEAR REACTIONS $d(n,n)d$, $E=0\mathrm{}$ MeV (cold neutrons); calculated scattering length and effective range; wave function also obtained.

• Received 7 October 1980

DOI:https://doi.org/10.1103/PhysRevC.23.1854