D-State and Pickup Effects in Nucleon-Deuteron Scattering in the Impulse Approximation

The effects of the $D$ state of the deuteron wave function and of the pickup scattering on elastic nucleon-deuteron scattering are investigated within the framework of the impulse approximation and with the neglect of the multiple scattering. A detailed examination is made of the various terms which arise from the identity of the incident nucleon with the target nucleons, and of these only the so-called pickup term is retained in the calculation. The latter term is treated only in Born approximation; the validity of this approximation is discussed. The computations which are carried out at 40 and 150 MeV indicate that the effects of the $D$ state and of the pickup scattering are quite large for scattering in the backward hemisphere.