Coulomb Effects in Three- and Four-Nucleon Systems

Abstract

Electromagnetic effects are studied in p - d as well as in p-³He scattering. Different observables are considered such as differential cross section and the vector and tensor analyzing powers. As an example calculations of the polarization-transfer coefficients K ^y′ _y and K ^x′ _x recently measured in p - d and n - d scattering are shown. Moreover the effect of the magnetic moment interaction is studied in the vector analyzing powers A _y and iT ₁₁ at different energies. The calculations have been done using the Argonne υ ₁₈ two-nucleon plus the Urbana three-nucleon interaction. It is shown that Coulomb effects as well as magnetic moment effects are appreciable and cannot be neglected.