Deuteron Stripping Reactions at 80MEV.

Available from UMI in association with The British Library. At intermediate energies the Johnson-Soper adiabatic model for deuteron breakup is inaccurate compared with more complete three-body models (e.g. CDCC), when applied to transfer reaction calculations. Two separate possibilities for this failing are investigated, with the intent of studying the most important physical contributions to such calculations. (i) The assumed degeneracy of the n-p centre of mass energy in all breakup configurations results in a lack of phase averaging and, in particular, an overestimation of the breakup component of the entrance channel wave function near the nuclear surface, of most importance to transfer reactions. This inadequacy of the breakup wave function is studied quantitatively and shown not to be significant for applications of the adiabatic theory to the (d,p) reaction at 79 MeV incident deuteron energy. (ii) Adiabatic studies of large l_{rm n} stripping reactions have highlighted amplitudes missing from theoretical calculations that are thought to arise from large n-p relative energy configurations. Although these breakup configurations are contained in such models as the CDCC, these models are computationally expensive and have yet to be applied to transfer reaction in anything but zero-range approximation. As an alternative to the CDCC approach we have reformulated the quasi-adiabatic approximation of Amakawa et al. to include spin-orbit distortions and introduced a consistent theoretical prescription for the mean breakup energy that is dependent on the centre of mass separation. This approach will be shown to reproduce qualitatively the main features of the CDCC calculation.