Low-energy p-d Scattering: High Precision Data, Comparisons with Theory, and Phase-Shift Analyses
Abstract
Angular distributions of sigma(theta), Ay, iT11, T20, T21, and T22 have been measured for d-p scattering at Ec.m.=667 keV. This set of high-precision data is compared to variational calculations with the nucleon-nucleon potential alone and also to calculations including a three-nucleon (3N) potential. Agreement with cross-section and tensor analyzing power data is excellent when a 3N potential is used. However, a comparison between the vector analyzing powers reveals differences of approximately 40% in the maxima of the angular distributions which is larger than reported at higher energies for both p-d and n-d scattering. Single-energy phase-shift analyses were performed on this data set and a similar data set at Ec.m.=431.3 keV. The role of the different phase-shift parameters in fitting these data is discussed.
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