Trajectory of a virtual pole for tritium as a function of the deuteron binding energy

Faddeev integral equations on a non-physical Riemann sheet of E energy relatively to the n+d channel are used for calculation of tritium virtual pole trajectory as a function of depth of the attracting part of n-p system potential in the 3S1-state. Preliminary calculations of the trajectory are carried out for Malfliet-Tjon potential representing difference of two Yukawa potentials complying with attraction and repulsion in NN-forces acting only in S-states. The studied near-the-threshod virtual tritium level should have periods of Efimov levels, and as to Malfliet-Tjon potential, a curve should be obtained with the maximum but located essentially to the left than for Yamaguchi potential at deuton binding energy equal to 0 < epsilon < epsilon d