The Three-Nucleon System Near the N-d Threshold
A. Kievsky, S. Rosati, M. Viviani, C. R. Brune, H. J. Karwowski, E. J. Ludwig, M. H. Wood
Abstract
The three-nucleon system is studied at energies a few hundred keV above the N-d threshold. Measurements of the tensor analyzing powers T20 and T21 for p-d elastic scattering at Ec.m.=432 keV are presented together with the corresponding theoretical predictions. The calculations are extended to very low energies since they are useful for extracting the p-d scattering lengths from the experimental data. The interaction considered here is the Argonne V18 potential plus the Urbana three-nucleon potential. The calculation of the asymptotic D- to S-state ratio for 3H and 3He, for which recent experimental results are available, is also presented.
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