THE 3-NUCLEON SYSTEM NEAR THE N-D THRESHOLD

The three-nucleon system is studied at energies a few hundred keV abov e the N-d threshold. Measurements of the tensor analyzing powers T-20 and T-21 for p-d elastic scattering at E-c.m. = 432 keV are presented together with the corresponding theoretical predictions, The calculati ons are extended to very low energies since they are useful for extrac ting the p-d scattering lengths from the experimental data, The intera ction considered here is the Argonne V18 potential plus the Urbana thr ee-nucleon potential, The calculation of the asymptotic D- to S-state ratio for H-3 and He-3, for which recent experimental results are avai lable, is also presented. (C) 1997 Elsevier Science B.V.