Phase-Shift matrix elements and levels of light nuclei

Shell model calculations, using relative coordinate matrix elements of different workers derived directly from two-nucleon phase-shifts, have been carried out for the nuclei of mass numbers 6 to 9. Matrix elements of D.S. Koltun (1967) and of Ley Koo et al. (1969) have been found to predict the excitation energies of nuclear levels better than the matrix elements of other workers; and the single-nucleon transfer spectroscopic factors have been found to be predicted equally well by the matrix elements of all the workers. It is pointed out that to obtain good agreement with experimental excitation energies, the strengths of 3S1 matrix elements of some workers need to be enhanced. (author)