Low Energyn−dScattering: Comparison of Experiment with Theory

$D$-wave effects are shown to be significant, though small, in the experimental $n-d$ scattering data at 4.5 and 5.5 Mev. Consequently, since the calculations of Buckingham and Massey include only $S$ and $P$ wave phases, a phase shift analysis of the experimental data is carried out to determine these phases so that a suitable comparison can be effected between experiment and theory. The resulting "experimental" $P$-wave phases agree only qualitatively with those of the symmetric-interaction calculations, but they completely disagree with those of the neutral-interaction calculations. The lack of quantitative agreement in the former case could be attributed to the range, depth, and possibly shape of the inter-nucleon potential chosen by Buckingham and Massey especially since their $S$-wave phases, which they found to be insensitive to force-type, are not in satisfactory agreement with the experimental results of slow neutron scattering.