Dynamical study of H-1((d)over-right-arrow, gamma)He-3 tensor observables in the energy range of 80 keV to 95 MeV: Tests of effective two-body models

Realistic interactions are used to study H-1((d) over right arrow,gamma)He- 3 tensor observables in the energy range of 80 keV to 95 MeV deuteron labor atory energy, as well as the differential cross section for the two-body ph otodisintegration of He-3. The Siegert form of the E1 multipole operator in the longwavelength limit is taken as the sole component of the electromagn etic interaction. The three-body Faddeev equations fbr the bound-state and continuum wave functions are solved using the Paris, Argonne V14, Bonn-A, a nd Bonn-B potentials. The corresponding nucleon-nucleon t-matrices are repr esented in a separable form using the Ernst-Shakin-Thaler representation. T he Coulomb force between protons is neglected and no three-nucleon force is included. The contribution of nucleon-nucleon P-wave components to the obs ervables is carefully studied, not only in the angular distribution of the observables, but also as a function of the deuteron laboratory energy for f ixed centre-of-mass angle. Comparison with data is shown wherever it exists . Results with simple Yamaguchi-type interactions with variable %D-state in t he deuteron are compared with realistic interactions and one of these model potentials is used to study the results in terms of contributions from spe cific wave-function components or terms in the electromagnetic operator. Effective two-body models are examined by means of a derivation that is con sistent with the underlying three-body calculation and that leads to an eff ective two-body t-matrix for neutron-deuteron elastic scattering carrying t he same on-shell amplitudes as the original three-body equations.